Saved & Intermediate are folders you can delete, however, you will lose Autosaves and Backups and probably some cooked files (which means you need to cook them again)
There are several considerations to shrink the Package Size.
I for myself play around with Texture Sizes alot, since they can eat a lot of space if not properly compressed.
Make sure you use proper Compression and the Max Texture Size is not awfully high (1k-2k should be enough most of the time)