@EagleBee93 wrote:
So, to my understanding this means that I have to copy my blocks folder to every new project folder i create in order to add it to the frequently used subfolders?
Technically yes, but only because you're trying to use "Frequently Used Subfolders". That isn't the best way to handle what you're trying to do. In a way, you've been given the correct answer to the wrong question.
For what you are trying to do, you should most likely use Library Paths instead. They can exist outside of the project's workspace. For various reasons (some valid, some questionable), my company uses an individual project file for each job.
But all of those project files link to a shared set of Library folders where we store commonly used purchased parts. Some of those we've downloaded from supplier websites, others we've modeled ourselves based on catalog dimensions. Some are iParts, some are individual. They're all stored in Library folders where they are subcategorized in various ways.
The quirk to Library paths is that you can't edit files while using a project file that considers their location a Library. Inventor considers Library paths to be read-only locations, because in principle they are supposed to be "standard" parts that don't get changed much. This is helpful in preventing accidental changes, but is a little bit of a nuisance when you find a minor issue (like a typo in the description) of a part you want to reuse from the library.
To edit files in the Library locations, you would need to have a separate project file that does not define that folder as a library path. I named mine "Librarian" (for obvious reasons). I don't use it for anything else, so it actually has the library location set as the workspace.