copying files to disk (best practice?)

[Soogs]

If you have files/folders in multiple locations which will end up on a separate drive,
is it better to do the transfers one by one (folder by folder) or simultaneously?

I'm trying to avoid fragmentation and trying to speed things up
I will not be able to defrag the destination drive so not sure if doing transfers at the same time will increase the change of fragmentation?

eg: 3 source drives, all have a mix of large, small and tiny files

Source Drive A -->
Source Drive B --> destination Drive D
Source Drive C -->

 

[Soogs]

thanks for the replies.

im using a windows machine to copy files between 2 retropie set ups and from windows to nas / nas to windows
wish I knew about this TeaCopy sooner

thanks again