You can't "save" an album without saving every single song on the favorite song list. Saved albums shouldn't be visible in the "Songs", since we would like to use that for single songs only. Please Spotify remedy this. I wanted to post this in ideas but for some reason I cant create new ideas.
The playlist workaround is cumbersome and quickly become to long.
We recently rolled a new version of Your Library with a new way of saving Albums.
From now, you can find your liked albums in the Albums section of Your Library; you'll just need to tap the heart on the album itself. Liking a song from an album won’t save the whole album and will add that song in your Liked Songs playlist.