I cannot save files to my (pocket) external NTSF "Imation" USB3 harddrive.

I can create new folders on the disc
BUT cannot save files onto either the drive nor a folder on the drive.
In the past I have copied folders onto the drive (it is a backup drive)
There are two hidden folders on the drive
I suspect SVI is the problem, but all I get is "Access denied"
Can I reformat the drive (NTSF) -- I know I will loose all data -- and will that solve the problem ?

I can create new folders on the disc
BUT cannot save files onto either the drive nor a folder on the drive.
In the past I have copied folders onto the drive (it is a backup drive)
There are two hidden folders on the drive
"$RECYCLE.BIN"
"System Volume Information" (SVI)
I understand "$RECYCLE.BIN""System Volume Information" (SVI)
I suspect SVI is the problem, but all I get is "Access denied"
Can I reformat the drive (NTSF) -- I know I will loose all data -- and will that solve the problem ?
My Computer
- Computer type
- PC/Desktop
- Computer Manufacturer/Model Number
- Toshiba, Lenovo (laptops) + 4 rigs
- OS
- XP Pro (x86) | 7 HP (x86) & (x64) | 7 Pro (x64)