Why moving file to one folder to other is fastest via web than local LAN?

Hi, why moving file from one folder on the nas to other folder in the nas is quickly via files.mycloud.com than local network that is very slow?

If you mean from one share to another, that is to be expected because the data must leave the NAS to your PC, then pack from your PC to the NAS. The file must be “downloaded” then “uploaded.”

But when using the app or web interface, the utility simply instructs the NAS to do it itself locally.