FreeFileSync Forum

Problem solved, the antivirus was obviously checking files as they were being copied and blocking there progress. Software works a treat and saved a power of work. Is there anyway to educate the Antivirus that freefilesync is bonified and legit and allows it to work unhindered?
Thanks for the quick ...

Trend Micro Maximum Security is my Antivirus. Can't think any files are open, but will investigate.

Can someone explain why I get this error when copy 1.6Gb of Folders to a new USB attached 4Gb Portable drive. I have administrator rights and checked security and permissions. Copies the bulk of the data and fails at the end with the above error message. Windows 10 64Bit.