How to delete files in usb

[hahaha680]

Hello,
i recently downloaded some files and put it into my usb.
and all of my files in my usb showed it's contant of 104KB
but actually i have a lot more then that. and i can't delete any files after that.and there were three more files in my usb and here are their names" medicina, RECYCLER,SVETEJEBLO.

 

[hang-the-9]

Sounds like you either have a virus or the file system got corrupted. If you have a back-up of the files, format the flash drive and try again.

 

[achen3835]

right click the file and press delete. What happens?