Unreal Engine 5 crashes when opening a level

I have apparently somewhat resolved it by moving the base folder higher up the list of subfolders on my drive. Before calling this solved though, can someone please explain the reason for this and best practice in terms of file creating?

Currently I have dropped the project folder on the initial drive which is not ideal, as previously it was in a series of subfolders helping to organise my work. I would ideally have the project folder a bit more organised but do not want to recreate the crash.

Thanking you in advance