hey guys i have a hard drive and a few flash drives I got from eBay that appear to be modded, so i want an app that can run a good diagnostic test to find errors then fix them, Also have a good format tool, perderably one that can restore it to its original state, since im using a android tv box otg Isn't a issue, I've done lots research and so far everything I have found either costs money or just doesn't do what I want, or possibly I don't know how to use it, there was one app that I think can format drives but my box doesn't like it so it just crashes im not at home but I know it says silkat tools or something like that