Best A3 Storage File Boxes in 2026

Double wall, single wall construction

Lift-off lid ships attached to prevent lid loss, then tears off for use

Basic-duty, standard set-up construction for moderate stacking or use with shelving

Made In USA Quality – IRIS USA’s Letter/Legal File Tote Box is a perfect filing storage organizer that can fit all your legal and letter size items safely with the anti-break, durable polypropylene material MADE IN USA.

Letter & Legal Size – File box is perfectly designed for any letter or legal size files, documents, and paper. Utilize the filing box year round to protect your valuables. The internal dimensions are 11"(H) x 11.75"W.

Water Resistant and Durable – The Letter & Legal Size Plastic Storage Bin Tote Organizing File Box has a max capacity of 20lbs enabling plenty of storage space for valuables. The durable Plastic File Storage Container Bin Tote is water resistant and thus can protect important files, letters, and personal items from spills, making it ideal for storing and moving personal items. It can also be cleaned with warm water and mild soap.

File box stores letter-size or legal-size hanging files

Interlocking lid snaps tight for secure stacking of multiple units

Made of Clear plastic so you can easily identify contents. Stackable to save space

Versatile File Box: Organize all your paperwork, letters, folders and hanging files in style with the ZICOTO file organizer storage boxes (ca. 15.4x12.4x10”)

Solid File Organizer: Extremly durable with reinforced bottom make the file folder box super stable; the linen fabric exterior is very easy to clean and a practical lid keeps any dust away from your documents

Space–Saving: Simply stack the file boxes for hanging files in your storeroom or shelves for optimal space usage; When not in use take advantage of the folding feature and put the collapsible file box away – flat, neat & tidy

Thick & Durable Material: These document boxes are made of high quality and PP material, anti-dust, moisture-proof, good flexibility, strong weight bearing, not easily deformed, durable for long lasting and easy to clean. Documen Storage boxes external size: 12.52 x 9.45 x 0.94 inches. Internal dimensions: 12.2 x 8.9 x 0.71 inches.

4 Pack Portable Project Case: With our portable plastic file storage box, your documents and magazines will stay organized and easily found. Which is prevent the loss wrinkle or damage of your important documents and help to keep your desktop drawers neat and tidy.

Wide Application: These plastic stackable storage box perfect for magazines, photos, stamps, envelopes, invoices, bills, papers and children's and-cut paper-cuts and drawings. Portable project case suitable for home, office and school use, also very convenient to use during trips.

Sold as 4/Carton.

Heavy-duty durable boxes featuring double-sided, double-bottom construction for stacking, storage

White with gray corrugated cardboard is sturdy and lightweight

Approximate Dimensions: 14.1 x 9.8 x 2.1 in; The interior dimensions(Approximate): 13 x 9 x 1.5 in

This lidded document box will protect your documents and help you to organize your workspace/ home

Elegant and durable document filing box for a well-organized home and office

CLEVER DESIGN: This flat box impresses with its stylish look, which is perfectly rounded off by the useful labelling. This makes it easy to identify the stored contents at any time.

PROTECTED CONTENTS: The storage box has a practical lid that safely protects the filed documents and loose papers from dust, dirt and moisture, keeping them pristine.

ORDER IN MOMENTS: This stacking storage box can be used to quickly create order on the desk, shelf or cupboard compartment. It can also be combined with other colours and products.

ARCHIVAL QUALITY: Made in the USA Lineco is a leading and trusting brand for archival art and framing supplies.

GET ORGANIZED: This letter protect case provide easy access to your important documents, photos, and similarly valued items, while providing protection from dust and light.

SAFE AND CONVENIENT: With our Flip-top file storage box, your documents and magazines will stay organized and easily found. Which is prevent the loss wrinkle or damage of your important documents and help to keep your desktop drawers neat and tidy.

Perfect Organizer for File&Documents - Are you still upset about the messy documents? Are you still impatient for not being able to find the documents you need? Don't worry, our newly upgraded file storage box can solve all these problems for you. Compared with the traditional file storage box, this file box is not only exquisite in appearance and fine workmanship. Perfect size, it is very suitable for the storage of documents, legal letters, books, etc, in the office.

Universal Organizer Box Size - The storage organizer fit both letter and legal size files, and other items except files. Extremely durable files boxes perfect for hanging files folders, suitable for normal cube shelves or closet shelves. These file storage boxes are also the best gifts and helpers for children to store school supplies during the back-to-school season. Internal dimensions - 14.3 inch x12.4 inch x10.2 inch; Outside size - 14.9 inch x12.7 inch x10.8 inch.

Collapsible Multifunctional Filing Storage Organizer - The outer box with linen fabric can be dustproof, inside and the bottom support is made of thickened cardboard, which is environmentally friendly and not easily deformed. The cover with Velcro not only allows us to cover the file box easily, but provides more storage space for the file. It also acts as a small filing cabinet for tax documents, legal files and other documents storage. When we are not using it, we can fold it up to save space.

【Double-layer Large-capacity File Box】Compared with other file boxes, our hanging file box adopts a double-layer design that can meet all your storage needs. These include 8 passport mesh bags, 8 card slots, 4 U disk pockets, 2 mesh bags, 4 outer pockets, 1 large pocket, and 1 main pocket with large space. They are ideal for storing cards, passports, CDs, USB, albums, birth certificates, and other valuables. The main pocket can fit both letter and legal-size files or anything else you want.

【Combination Lock Protection】Compare to other file cabinet which did not have a separate locking compartment on top, our 2 Layer File Box can lock documents and items in separate compartments for security. High-quality password lock provides maximum security for your valuables such as contracts, cards, certificates, conference materials, passports, etc. The package includes an instruction manual for a combination lock.The double zipper design makes it easier to open and close. No keys required.

【Fireproof and Water-resistant Safe】Our 16.14*13.8*12.6 inches large file box is made of double-layered non-itchy silicone coated fiberglass which stands up to the temperature up to 2000℉. The double-layer file box is fireproof and waterproof, which can effectively protect your important documents in a fire, flood, and wet weather. They will further keep your files intact.

✅【Fireproof & Water-resistant File Box】: This fireproof lock box is made of double-layered non-itchy silicone coated fiberglass which stands up to the temperature up to 2000℉. The unique material not only can protect the files stored in the box from burning but also protect them from getting wet when it’s raining. This file organizer offers great safety for your important files.

✅【Combination Lock】: The double zipper code lock improves the security of the file storage box. In addition, the three-digit code lock device provides the maximum safety for your valuables such as contracts, cards, certificates, conference materials, passports and etc.

✅【Large Capacity】: Dimensions: 16.2*12*10.4 inches. The file cabinet not only can fit both letter and legal-size files but also can store your important documents, books, CDs, USB, albums, passports, cards, birth certificates, and other valuables because of the mesh bags we designed in the liner of the lids.

👍【Ideal Solutions for Citylife Project Case】This paper organizer box is just what you need to keep your projects organized. Whether you're on the move or in the office or classroom;

👍【Perfect Capacity】Accommodates A4 paper, 12.13" x 8.82" photos, and scrapbooking paper, scissors, adhesives, cards, etc. Also great for safeguarding electronics, e-readers, tablets, and charger cords. With rounded corners, these document organizers protect fragile items from potential damage;

👍【Snap-tight Latches】Latch snaps easily in place to secure documents;

ORGANIZE IN STYLE: Our Sverker storage boxes help increase your efficiency by storing and putting away all of your papers! These attractive document boxes are timeless and dress up your office while being storage essentials for your workspace.

EXTREMELY VERSATILE: This scrapbook box’s elegant design works well with most home and office decor. It fits A3 and legal-size documents like loose papers, flyers, brochures, magazines, children’s art and more so you can have them on hand or stored away.

SUPERIOR MATERIAL: The photo storage box’s core is made out of solid, recycled fiberboard and is covered in paper laminate that gives it a high-end look and feel. The durability and strength of the box is constructed for everyday use for years to come.

SECURE FILE STORAGE - Our locking file box is ideal for storing medical records, personal letters, legal files, and confidential office documents.

GET ORGANIZED - Complete with convenient compartments, our large lock box allows you to store pens, calculators, business cards, files, and other supplies.

DURABLE - Built to last, the file box with lock features reinforced hinges, durable corners and metal rails, and anti-scuffing rubber feet.

THIS FILE BOX WILL ROCK YOUR WORLD Tired of using easy to tear cardboard boxes? This innovative file organizer box decorative Linen Fabric, inside wall board and remove bottom made of durable wood. Say bye bye to paper filing boxes! Glamorous gray color and high cycle life, you will satisfied with our file boxes.

PORTABLE SIZE AS DAILY FILING Storage HELPER 13.8"(L)*8.7"(W)*10.6"(H)- Small File Box. Put the lid under the box,keep file box right at your fingertips on your work desk or shelf. Close the lid of box, our attractive file storage box hides the clutter, holds entire file system & the lift-off lid keeps the dust off and document safe.

LITTLE THINGS THAT MAKE BIG DIFFERENCES Foldable to save space, once file box done it’s job, you can collapse it flat hidden in a closet until needed again.

[Fireproof and Waterproof] Portable Document Box is made of dust-proof double layered non-itchy silicone coated fiberglass. SGS tested and certified with UL94 VTM standards: the file box withstands up to 2000℉. Usually after a fire occurs, the temperature at the fire site will reach nearly 800℉, which is within the tolerance range of our document organizer box. The glass fiber has excellent waterproof performance. In most cases, our document storage box can withstand the impact of water.

[Safe and Convenient]The double zipper code lock increases the security of file storage box. Details such as the soft handle and the non-slip pad at the bottom reflect the user-friendly side of the product. Built-in smooth hard board, the purpose is to make the storage box stronger and not easy to deform, boxes can be stacked to bear weight easily. Whether you use this file bin indoors or outdoors, it can be easily folded, and you can use it anytime, anywhere.

[Multi-scene use] You can not only put the fireproof box in your home, office, fireproof safe, locker, but also use the fireproof box for camping, travel and various outdoor activities. The anti-static material does not easily stick to dust no matter where it is used. In addition, the important items in your garage storage can also be handed over to our car trunk organizer. Of course, it is also a good choice to give it as a gift to your family and friends.

Tuck away all your important documents inside this roomy, stackable file tote. Thanks to the snap-tight lid, your archived files remain secure while in storage.

Interior Dimensions: 15" x 12.2" x 9.5 " H

Accommodates letter or legal size hanging files.

Made In USA with Global Material – IRIS USA’s Letter Size Plastic Storage Bin Tote Organizing File Box with Durable and Secure Wing-Lid is a perfect filing storage organizer that can fit all your legal and letter size items safely with the anti-break, durable polypropylene material made in the USA. File storage container has a ledge on the rim of the container. By hanging the files on the rims, it makes it easy organize your documents.

Secure Latching Buckle - Plastic File Box Bin Tote Organizing Container with Durable Lid preserve and protect valuables and important documents inside.

Handles – Built in handle makes it easy to carry the file boxes. The screwed-on handles are securely attached to the lid increases portability.

Stackable: Keep everything you need for a busy day neatly organized, you can get more done. This storage box with 2 lids help you create a place for everything and keep everything in place, so you can focus on the tasks that really matter

Versatile: You can put your significant papers, documents, pictures, invoices, instructions, magazines, etc. in the plastic file case to avoid them lost, moisture and dust proof

Transparent View: This plastic Storage box features a transparent design that makes it easy to identify the contents without opening the box, offering infinite uses and are ideal for organizing your home and office

MADE IN USA QUALITY – IRIS USA’s Letter & Legal Size Plastic Storage Bin Tote Organizing File Box with Durable and Secure Latching Lid is a perfect filing storage organizer that can fit all your legal and letter size items safely with the anti-break, durable polypropylene material made in the USA.

LETTER & LEGAL SIZE – File box is perfectly designed for any letter or legal size files, documents, and paper. Utilize the filing box year round to protect your valuables.

WATER RESISTANT AND DURABLE – The Letter & Legal Size Plastic Storage Bin Tote Organizing File Box has a max capacity of 20lbs enabling plenty of storage space for valuables. The durable Plastic File Storage Container Bin Tote is water resistant and thus can protect important files, letters, and personal items from spills, making it ideal for storing and moving personal items. It can also be cleaned with warm water and mild soap.

[Fire Safety &Water Proofing]: Our hard document bag is an excellent fireproof and waterproof anti-static bag made of upgraded silicone fiberglass fabric. This fireproof fabric makes it easily pass the UL 94 VTM-0 fire resistance test. It can withstand temperatures as high as 2000℉ in a fire, and it adheres to the mission of protecting internal documents. In addition, it can also be used in rainy days.

[Large Capacity]: File storage bag size: 15.8*12.8*4.8inch. In order to have more storage space, we designed multiple mezzanine layers for document organizer, including 4 passport/cash pockets, 18 card slots, 8 u disks pockets, 7 large pockets and 2 zippered pockets. Not only can it hold various documents in A3/A4 size, but it can also hold laptops, documents, certificates and other valuables.

[Humanized Design]: The comfortable handle on the top and the adjustable and removable shoulder strap are made of high-quality nylon, plastic and stainless steel accessories. In order to reduce the carrying load, a widened fixing belt is designed on the back so that the file storage bag can be fixed on the pull rod of the trolley case.

Holds letter or legal sized hanging file folders

Medium-duty plastic box holds up to 30 lbs of weight

Top compartment keeps supplies visible and accessible

Easy-lift handles and transparent lid

Use alone or set inside rolling Advantus Heavy-Duty File Shuttle

Black

1.This file box is produced by pp plastic. Clean easily, durable for both abrasion and use. Outer: 30.7*23.2*2cm/12.1 x 9.1 x 0.8inch; Inner: 30 x 21 x 2cm/11.8 x 8.3 x 0.8inch.

2.Transparent setting . The box contents clear at a glance . simple fashion.

3.Use: office document storage, gift packaging, magazine photo storage, important documents storage on travel and other purposes

Plastic Material - Made of sturdy PP material, anti-dust, good flexibility,strong load-bearing,durable for both abrasion and use;The plastic box contents clear at a glance, simple fashion and beautiful appearance(Kindly Note: Its ONLY 1 lid for all 3-deck boxes, Not 4 Lids separately)

Good sealing & Stackable - Each deck with two locking clasps are robust to keep contents secure,easy to open; Stackable design allow you use 1,2,3 deck or Stack more than 3 deck to make storage easier

Multi-purpose - With this file box,your documents will stay organized and easily found when the time comes,it's not only can help in keeping your desk file drawer neat and tidy,but also can prevent the loss of important documents,wrinkle or damage.No matter how long,it will keep your papers in good conditions

Stackable: Keep everything you need for a busy day neatly organized, you can get more done. This storage box with 3 lids help you create a place for everything and keep everything in place, so you can focus on the tasks that really matter

Versatile: You can put your significant papers, documents, pictures, invoices, instructions, magazines, etc. in the plastic file case to avoid them lost, moisture and dust proof

Transparent View: This plastic Storage box features a transparent design that makes it easy to identify the contents without opening the box, offering infinite uses and are ideal for organizing your home and office

【Durable & Sturdy】This paper storage box is made of high quality PET material, moisture-proof, good flexibility, anti-dust, strong weight bearing, not easily deformed, durable for long lasting and easy to clean.

【Transparent View】The A4 file box contents clear at a glance simple fashion. Item out size: 13.44"x9.11"x1.36"(LxWxH), inner size: 12.72"x8.27"x1.2" (LxWxH). Stackable portable project case for efficient storage.

【Multi-purpose】This PET plastic storage box is ideal use for the magazines, photos, stamps, envelopes, invoices, bills, papers, office document storage, gift packaging.

Hiceeden 4 pack plastic project case external size is 12.5"Lx9.4"Wx1"H, and internal size is 12"Lx9"Wx0.7"H. Suitable for storing the dimension of files or certificates like letter size 8.5"x11" or smaller than it.

Documents storage boxes made of premium pp material, which is firm, durable, moisture proof, dust proof and easy to clean. Trasparent design is convenient to identify the inside contents without opening boxes and easy to take.

These plastic paper storage cases with snap-tight latches and stackable design keep projects inside safe and organized neatly in one place, therefore find everything you need easily and quickly.

💕【Portable Size】 1 * scrapbook paper storage box, the measures is14x10.5x1.6 in, can hold A4 Paper easily. Portable size and light in weight, slim design not only fits on a bookshelf or desktop, but also suitable for carry them to discuss business, very convenient.

💕【Transparent Design】 This plastic portable project case features a transparent design that makes it easy to identify the contents without opening the box. The project cases have two snap-tight closure latches, which are sturdy and durable, with good airtightness, which can ensure the safety of items.

💕【Thick & Durable Materials】 These document boxes are made of high quality material, anti-dust, moisture-proof, good flexibility, strong weight bearing, not easily deformed, durable for long lasting and easy to clean.