usb flash drive

[Butrick]

I have two USB flash drive's one is one hundred and the other is two hundred GB and when I put video files on them they both delete all the files off of them and I tried to reformatting them and it didn't work can you help me please.

 

[I3lue1]

If they're from some obscure company and you bought them off aliexpress or something of the sort then don't be amazed of this. There's a reason you pay 15$ for a 100 gb no-name usb drive and the same 15$ for a 8 Gb Kingston drive. It's purely and simply quality over quantity.

Only thing you can do is to try and copy smaller files at a time (not 6 gb movies) that don't exceed a few hundred megabytes. Also I'd avoid filling the drives to more than 60-80% because I fear they will misbehave.