CleanUSBDrive is an utility to eject any external drive removing those files that you don’t want to see in your smartTV multimedia-browser, for example. It cleans all drives from system junk before ejecting, with a very high performance. 
Features:
Simple and fast
Very minimalist design
Status bar App
Remove .DS_Store, ._AppleDouble, Thumbs.db, .Trashes, .Spotlight, .TemporaryItems files, and many other kinds of annoying files (fully configurable)
Select what type of files do you want to remove
Eject drive automatically after clean
Works with any external drive (USB, Thunderbolt, FireWire)
Launch-at-login option
Progress bar
II. Instruction
II. DOWNLOAD NOW
