How long to wait to check if a file has been copied with Powershell

I am new to PowerShell and wanted to ask, how long I would have to wait to check if a file has been copied on a network. I read a lot about how to check if a file has been copied but I wonder, how long I have to wait to check. Depending on the size of the file together with the speed of the network, I would like to understand, how you professionals do such a check, preventing to check too early but also not waiting too long to see if a copy of a file from A to B was successful or not.

Any advice?

Thanx a lot for the help,

Mike