I hope that it hasn't completely died, but Yosemite doesn't recognize a flash drive when I plug it in. I bought a new flash drive at Best Buy. There are a lot of programs that work on Macs & that claim to recover files from a flash drive. My first choice is a free program. I'm sure that I'll get a lot of recommendations, but what programs are recommended by Apple or are available on the App Store or are recommended by people on this forum? I read elsewhere on the 'net that one should see if disk Utilities or "Apple" > "About this Mac" > "Storage" recognizes the flash drive.