Hello Everyone!!!

Actually I've a pen drive (32 GB) which is labeled as Kingston but it is not! Its a fake device!
Now before formatting it, it was working properly but after formatting it the problems occurs---
1. File of big size just like a divx movie (700MB) does not works!
2. File names has been changed to a unknown character! (Not caused by a virus)
3. Files of size less than 1 MB is working properly!
4. In Disk Management it shows 777 MB unallocated disk space!

Now please help me to fix this problem!!!