WD passport 4TB drive

Hi there, Just joined the forum and need some advice please on my 4TB WD SSD USB device I use as a home backup storage device.
I was on windows 7 and just upgraded to windows 10. My WD scheduled backup now says there is not enough space on my SSD UBS drive.
Can anyone tell me if the backup will now need to be completely re-done for windows 10 or should the backup work as it did on windows 7. Its almost as if the backup wants to now do a complete new backup rather than an iterative one replacing only the changed files.

Thanks for any help here

Hello suitman,

Try to check the available space on the External drive as the backup software is saying that there is not enough space for backup.