Would have been 3 - 4 stars but for one problem (a problem to me at least) and that is the inability for some unknown & inexplicable reason there is no option to be able to delete all files on a USB from the app on your phone. You literally have to play each video and allow it to start before you can delete it. If you have a fair few videos, this delete issue can take ages. Simple fix, give a SELECT ALL option. Taking USB out of Sync unit and deleting on computer is ok, IF you're at home. Fix it