Total Commander

Hi
When I try to copy the file appicon.ico of Thunderbyte portable version, the copy process takes forever.
I have no idea why that happens.
Any clues?
Image: https://i.imgur.com/2Ese5XW.jpg

a) does it work with explorer?
b) does it work with TC32bit
c) what virus scanner do you use?

mayhaps its the tc keyfile and who knows what else got infected by a virus? ^^

There can be two main reasons:
1. Antivirus. Some cloud based solutions can take an awful lot of time when they assume that a file is suspicious.
2. Bad memory blocks on the USB flash drive can also take a lot of time when error correction is involved.