Can I Delete Content of Picture Folder After Restoring Catalog to Different Hard Drive

I’m moving pictures from an older Windows 10 computer to a new Windows 10 computer.  New computer has a solid state HD and a regular hard drive. Have a functioning PSE15 program and catalog on the old computer.  Used MS File History to transfer all data files (including Pictures) to default location (SSD) on new computer.  Installed PSE15 program on new computer SSD.  Used PSE 15 Backup and Restore functions to successfully move catalog to new computer (put the new catalog on the regular hard drive (D:) to save space on the SSD).  Everything in Organizer/Catalog appears to be working correctly.  I would like to regain some space on the SSD, so here’s the question:  Can I now delete all pictures in the “default” location (C:\Pictures).  It does appear that the folder structure and the actual picture files on the regular hard drive are correct.