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#11
I disagree. The D drive will be considered a system drive if you move the whole user folder itself (Users\Adrien\) because it contains the hidden system folder AppData. Therefore indeed an image software would need you to back up the whole D drive too, just because of that folder.
If you move only the Pictures folder though, or the Music, Videos etc, these are not system folders. They're just normal folders. They have specific nicknames ("My Documents" for example, while the real name is Documents), but that doesn't make them system folders.
I've moved these on mine, and the D parition is not considered a system parition at all.