Here are some articles on Hometalk about repurposing file cabinets: https://www.hometalk.com/search/posts?filter=repurpose%20file%20cabinet
One of mine is a tablet and cell phone charging station in a kitchen. Top drawer has all the labeled cords. Handy, yet out of sight. Bottom drawer has phone books, paper, pens, pencils markers, ruler, tape measure, scissors, etc. Also keep my backyard sunglasses in there too.
I took out drawers, flipped on side, refinished, store brooms, mop and bucket, kids sports equipment, etc.
I've repurposed a few into just storage drawers - made them whimsical and fun - they are featured in this book: https://www.amazon.com/Painted-Whimsies-Decorative-Accents-Garden/dp/1564774511/ref=sr_1_15?ie=UTF8&qid=1547610372&sr=8-15&keywords=Ferguson+%26+Skinner
One of them is even on the front cover of the book :)
If you like to sew and have lots of pieces of fabric, hang the fabric on hanging files. It'll keep your fabric clean and organized.