1337xx.to, not the real site. I only downloaded .flacs
Should be ok if there is no bad vulnerability in the player you are using.
If you are paranoid, plug the files into virustotal.
No.
If you’re paranoid, you can convert the FLACs to WAV on an isolated computer (or VM), copy them and recompress them to FLAC or other formats. If there is a vulnerability in FLAC, it won’t persist through transcoding.
Just use spotdl https://github.com/spotDL/spotify-downloader
I dont wanna listen to music that sounds like shit. I love uncompressed music