How do you tidy up the {user}/Library folder
Trying to release some disc space on my MacBook Air running Catalina and I find that in my User there is a 60GB discrepancy between the visible files in Finder and the total space used. There seems to be an invisible directory /Library in my user with a vast amount of stuff in it;
a - Can anyone suggest how I can get in to see it (I admit I have used Terminal to have a look around but it is very clunky when dealing the directory of this size);
b - Can anyone guide as to what this is folder is used for and possible criteria for keeping/binning any of the contents.
It is a significant problem because I have a 128GB drive and this one folder is taking up nearly 50% and preventing me from upgrading.
Many thanks
MacBook Air 11″, macOS 10.15