Pendrive Showing occupied space but files are not visible.

Hello,
My Pendrive Showing occupied space but files are not visible. I tried attrib commands but it's not working. I formatted it by different methods. after format occupied space is released. but again whatever data is copied into Pendrive that data are not showing while next time Pendrive plugged into PC. I have 64GB Hp v285 Pendrive

I googled and tried these following different options
1.attrib -h -r -s /s /d g:\*.* (assume here g is drive letter of Pendrive) ->Not Woking
2.Using Disk Part (I deleted partition and created new primary partition) ->Not Working
3.Using Official HP Format Tool (It shows format fails, I tried NTFS and FAT32 in this tool)(Not Quick Format)->Both r not working
4.Using Disk Managment(Not Quick Format) -> it's working I mean format success but again whenever re-plugged Pendrive into PC and copied some data, then the problem rising again(Most of Media files r not visible, some files are visible like RAR format files but those files are corrupted).

[It showing exFAT under explorer(My computer) and FAT system under Disk Management ]

Note: My PC is virus free and I tried same steps in different computers but not solved.
Please help me