The 10 Best Portable File Boxes

With the ability to hold both legal- and letter-sized documents, the Advantus Companion 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.

For sensitive documents, the Vaultz Legal 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.

The Iris Desktop is a simple, minimalist option that comes in three sizes and has two sets of handles so it can be carried from different angles. It's perfect for taking back and forth from work to home, but it doesn't lock, so it's not suitable for confidential files.

The Internet's Best Collapsible is a fine alternative to unattractive cardboard or plastic models, thanks to its handsome linen construction. It’s offered in both gray and charcoal, and has large handles that make it a breeze to carry.

With the SummerZee Expanding 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.

Featuring a strong and sturdy handle and a clear lid that also stores office supplies, the Sterilite Black 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.

If you don't have a ton of papers to organize, the Amazon Basics Letter 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.

With a deceptively spacious interior for its modest size, the Avlone Double Closure 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.

It may not have hanging rails, but the Office Depot Mobile 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.

Featuring a latch that doubles as a business card holder, the Iris 9 Quart Clear 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.