Transferring from PC problems

I just got a new Mac Book Pro over the weekend and thought it would be an easy transition from PC. I managed to save all of my files to other places before formatting my 2 TB MyBook and as soon as I formatted it I regretted it. It’s super slow has corruption problems and takes about 15 minutes to transfer 15mb. Please if anyone has had this problem could you offer me some advice? I’m new to macs and am not very tech inclined. Thank you for your help

Did you test the drive for errors?