If that was the only drive, that laptop now needs a new drive.
But ideally, what you want to do is find all the personal and work files on that drive, and copy those off to some other drive.
Put that in the new laptop, instead of the whole old OS drive.
Does the old laptop still work?
the old laptop does still work yeah, but combining an almost full hdd with old components means it takes about 40 minutes just to boot, and you better not even look at it while doing so or might explode.
It's my mums computer, anm I'm giving her my previous laptop for the change. the "new" one is also quite a few years old already, but galaxies away from hers.
Given I don't really even know what she has on her files and how she has everything organized, I though best to just move the drive, so that she'd have everything stay as is (and I'd just add a shotcut to her old system folder on the desktop). I also don't have a tb laptop compatible drive laying arround, so I wasn't considering moving every file from the old drive as a possibility.