storage

Here are a couple of articles about clearing up storage space by optimization in conjunction with iCloud.

How to free up storage space on your Mac - Apple Support

Use iCloud Photos to store photos in iCloud - Apple Support

In addition to the aforementioned "other" storage. Time Machine Snapshots can also take up space. Like Other they are supposed to be removed if your computer needs space.

About Time Machine local snapshots - Apple Support

Guessing the Internal Drive is a small 128 GB size and thusly the panic to create empty Space ?

What is “Other” storage on a Mac, and how can I clean it out?

How to free up storage space on your Mac

• See used and available storage space on your Mac Special Note from link. Other: Contains files that don’t fall into the categories listed here. This category primarily includes files and data used by the system, such as log files, caches, VM files, and other runtime system resources. Also included are temporary files, fonts, app support files, and plug-ins. You can't manage the contents of this category. The contents are managed by macOS, and the category varies in size depending on the current state of your Mac.