When a program zeroes a disk, it wipes everything. And I mean to say every partition, every single bit of data, everything...
Wipe Drive overwrites all data on selected drive, it means all partitions. Wipe Partition removes only one partition. If there is several drives, must wipe all one by one.
This is Win 10's own reset function, so I guess my data is safe then, gone from spying eyes of the next owner Wasn't sure if it would ignore other partitions or not
Rest assured no one will recover your data. It needs special labs, environment and procedures from skilled personnel. Even so, it is unlikely to recover data after wiping a disk, besides I don't believe you are subject of interest to be targeted...
Recovering the data was not my concern, I just had a bad feeling for a minute that choosing that reset option might only clean C: partition, not any others, so imagined the next owner to open D: and see my product keys etc So long as that option cleans all partitions, I'm happy
I've been using File Shredder for several years now since it has an option to zero the empty space on attached drives; it appears to do a good job. Ccleaner has a similar function but I haven't tried it. "Remove Files and Clean the Drive" sounds like it zeros everything prior to trashing or reusing a drive.
If you have only one physical drive then all partitions on it will be wiped if you select Remove files and clean the drive. However, if you have multiple drives then you need to explicitly select whether to wipe all of them or only the one with Windows on it: Since it was a tablet, selecting Remove files and clean the drive would have been sufficient to wipe all the partitions (not just C on the single drive inside.