at least for your local files, give "everything"[1] a try. While it doesn't allow searching inside files, as long as you know the name you'll find it instantaneous.

[1]https://www.voidtools.com/

Windows only. Love it on my windows machines though, wish there was an analog for Mac/Linux

I did my masters degree in Stockholm and one thing I think is very important to know is that it is very difficult to find a job without speaking proper Swedish, so if you go to Sweden and at some point decide to change jobs, it might be difficult if you didn't learn Swedish yet. I was in a CS masters program with about 30 other international students and none of us even got a IT related side job (not even at the international companies like IBM, ...) although Kista as part of Stockholm likes to be called "the IT capital of europe ...".

Besides that, I really wouldn't worry about crime etc. Swedes definitely have a different perception to crime and danger in general compared to the rest of the world I'd say, simply because Sweden is so peaceful.

I lived in Husby, which is considered "ghetto" by Swedes and the riots this year happened pretty much in front of my door. I didn't even notice anything and was never scared to walk home at night, but every Swede I talked to reacted pretty shocked when I told them where I lived. So I really wouldn't worry about that, especially if you got along in Moscow.

Good point - "ghetto" in Scandinavia usually means that if you are drunk and in general indisposed, you'll be a bit more perceptive to your surroundings than usual if you walk home alone after midnight.