I have several suspicious folders and files in my library folder. And I was wondering if I should delete them.
this is just a file containing the word:
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If you can’t be sure they are safe, make a backup and check you have a copy of the files and then delete them.
Library can be finicky when you delete something the system needs, but Application Support with a space is legitimate. The others you show in th image don’t come from Apple so they’re malware at worst or third party created at best.