How does File Manager delete file so quickly compared to Remote Control

This is a query rather than a problem but would love to know the answer. Recently I had to delete some backup files from a remote external disc and initially did that via remote control using the Windows file manager on the remote machine. The files were quite large at around 500Gb so the windows deletion process took a while.
Today I did the same thing again but using the LMI file manager and was amazed to find that the deletions only took a few seconds even for the larger files. Can anyone explain how the LMI file manager can do this so quickly while Windows file manager takes so long?