I recommend using pen and paper and then digitizing later, assuming this is for notes. It will help you internalize the lecture or reading better in the moment and the act of digitizing your notes will reinforce your knowledge and provide you with better material for tests.

I think the only digital option that could come close to this would be an e-ink tablet but those kind of suck. Better to spend $50 on paper and pens than $500 on a tablet that isn’t as good for the purpose.

C’mon bro just one more stock buyback bro just one more stimulus I’m good for it.

If you own the copyright then yes this is 100% legal.

There are already apps that are like this. They usually add a couple features to the paid release so that people feel like they are getting something extra for the money. The good ones will eventually move those features to the open release eventually. However, this incentivizes keeping part of the app closed source so that nobody can just rename and re-release the paid version.

It is 100% up to you for how to handle these tradeoffs. Personally, I think so long as you are principled and ready for some criticism - and can handle it gracefully - getting paid for work that builds your open source app is a very good idea. We don’t all have the luxury of maintaining high quality unpaid side projects!

I would recommend using this as an opportunity to build out and use a backups system. Whenever I get a new laptop, for example, I just make a(nother) backup on the old laptop and restore whatever I want to the new one. If there are any files I want that are normally excluded from backups, I either tweak my rules to include those files/put them in a different directory and repeat the process or just make a new manual external backup copy temporarily.

If you have good backups then your new drive can be populated from them after creating new partitions. Optionally, you can also take this opportunity to reinstall the OS, which I personally prefer to do because it tends to clean up cruft.

Also, if you go this route, your data on your old drive is 100% intact throughout the process. You can verify and re-verify that all the files you want are backed up + restored properly before finally formatting the old drive for use in the NAS.