Aslam-u-Alikum

Tamam Experts se Guzarish hy k mere problem solve krein.
Mere pas 8GB ki flash drive hy jo pahly to bilkul theek thi lakin kuch arsy se us se data PC pe copy kron ya PC sy Flash drive me to bohat ziada slow copy hota hy. hata k 30MB k data ko copy hony me b 5 se 8 mint lagty hien. main ny hr trha se try kia hy. device manager se b best performance wala method use kia hy par farq nahi para. main control penal me ja kr admin tools k zariye isy FAT32 se NTFS format kia lakin phr ksi b kism ka data copy kron to corrupt ho jata hy. jb FAT32 me karon to thek rehta hy. is ki kia waja hy? Plz helppppp me