Why doesnt my flash drive work

[roofman23]

Hello,
when i put my usb flash drive in the computer i try to drag files in it and shortly after it has a error messege what could be happining

 

[CoffeeDrinker]

What is the error message, and also what format is the allocation table? FAT32 or NTFS?

 

[pjmelect]

More information needed what is the error what make/ model is the drive and what size is it? Flash drives in general are very reliable and when you get an error message the chances are that you have a fake drive. On the other hand without the above information you may have just filled up the drive.