The 10 Best Portable File Boxes

Featuring a latch that doubles as a business card holder, the Iris 19 Quart Clear (about $28) provides both convenience and durability. It has a rail for hanging folders and an opening that can be fitted with a padlock to protect sensitive documents.

It may not have hanging rails, but the Office Depot Mobile (around $28) is an excellent choice for those who can’t, or don’t want to, pick up and lug heavy boxes full of paper. And when you’re done with it, it folds flat to save on storage space.

With a deceptively spacious interior for its modest size, the Avlone Double Closure (appx. $35) is great for storing important documents. It sports a glow-in-the-dark strip, so it can be found quickly in emergencies, and can hold cash, small electronics, and other valuables.

If you don't have a ton of papers to organize, the Amazon Basics Letter (around $7) is a practical, budget-friendly option. With 13 expanding pockets, it can hold up to 900 pages and is extremely compact when closed, so it's easy to tuck under your arm on your way out the door.

Featuring a strong and sturdy handle and a clear lid that also stores office supplies, the Sterilite Black (around $16) is easy to carry and holds up well to frequent travel. It does not have a built-in lock, but there is a hole that will accommodate a small padlock for security.

With the Woeau SummerZee (about $23) you get 24 rainbow-colored pockets that make it easy and fun to organize your paperwork. The plastic is rigid enough to stand up on its own, though it's a little on the flimsy side compared to other options.

The Internet's Best Collapsible (appx. $25) is a fine alternative to unattractive cardboard or plastic models, thanks to its handsome linen construction. It’s offered in four colors, and has large handles that make it a breeze to carry.

The Iris Desktop (about $25) is a simple, minimalist option that comes in a couple of sizes and has two sets of handles, allowing for alternative carrying methods. Its open top makes for easy access, but it doesn't lock, so it's not suitable for confidential files.

For sensitive documents, the Vaultz Legal (around $31) provides an extra level of protection with its double combination locks. It features a chrome label holder that's just the right size for a business card, and the steel corners and aluminum rails make it super durable.

With the ability to hold both legal- and letter-sized documents, the Advantus Companion (about $33) is a versatile option. It's made of a very sturdy material with a semi-transparent lid that sits high enough that folder labels won't get crushed.