Jumpers were mainly for older IDE drives, but if your old drive is SATA, no jumpers are needed. If the new PC sees the drive but won’t assign a letter, try Disk Management (diskmgmt.msc) to assign one manually. If access is denied, take ownership via File Explorer → Properties → Security. If the drive is corrupted, try chkdsk or recovery software.
If your new PC sees the drive but won’t assign a letter or let you access it, open Disk Management (diskmgmt.msc) and try assigning one manually. If you get an access denied error, take ownership by right-clicking the drive, going to Properties → Security, and adjusting permissions.
Check the drive’s health with CrystalDiskInfo or run wmic diskdrive get status in Command Prompt. If the drive shows as RAW or corrupted, data recovery software can help.
Also, jumpers only matter for IDE drives—if yours is SATA, you don’t need them. Hope this helps!