Windows 11

Save what you want on a different drive or in the documents folder. All the personal user folders and anything on drives other than where windows is installed are the only things that, by default, do not get erased when you reinstall Windows.

I'm not much of a cyber security expert, but I'd be cautious with the old files.

As other said, unplugging those drives while you reinstall will ensure no mess ups can happen (typically a misclick when selecting the drive/partition). Yes the OS drive will be wiped. For "clean" reset, I'll usually just let the OS installer wipe everything. When it asks to "keep data" say no (at this point you've unplugged your actual data drives).

What the nature of the compromise? Was it limited to some online accounts, or was there an active virus on the computer?

If the computer was infected personally I'd boot up a linux live boot and run them all drives through an anti virus or two and painstakingly only keep personal data that can't easily be re-downloaded. Yes, it'll probably take a week. The theory behind this is, if something hid it self on the other drives, you reduce the chance of coming back. I am not aware of this actually happenning, but I'd play it safe as reasonable. A truly parinoid person would just throw out all the drives and start over - but that's not practicle.

If it was only some online accounts, I'd be a less anal about copying data over, but would at least run a scan or two over it.

Finally, I hope part of your password reset included a password manager and using long random passwords on everything, as well as set up 2fa wherever possible.

If not, bit warden (self-hosted) or keepass are popular choices in the realm of you have control of the data, not relying on someone else's cloud to keep it all safe and backed up (backing up the keepass file to a cloud drive is recommended for off-site back up, and to sync between devices if you don't use something like syncthing).

Are those seven separate physical drives?

A reset shouldn't affect them, but if you want to be sure, first you should have backups, like with a cloud provider. For example, my data is replicated in 3 places at home (to protect against drive failure and me being a dumbass), and one online backup.

If it were me, I'd make sure I had a backup, then I'd disconnect those drives just to be sure. Software can't delete a drive that's not connected.

Then I'd do the reset, setup the machine, and then reconnect the drives.