System data size MacBook air

The Other Category should not be altered, modified, move or deleted nor should it be attempted to be. Doing so may corrupt the OS and rendered the OS inoperative requiring a Wipe and Re-Installation.

The Other category is a potpourri of files which include:

• System temporary files

• macOS system folders

• Archives and disk images (.zip, .iso, etc. - often found in the Downloads folder)

• Personal user data

• Files from the user’s library (Application Support, iCloud files, screensavers, etc.)

• Cache files

• Fonts, plugins, extensions

• Other files that are not recognized by a Spotlight search

• Media files that cannot be classified by Spotlight as a media file because they are located inside of a packag

They can be located anywhere on your hard drive. The files that you have control over are located in the Documents, Downloads, Pictures, Music and Movies folders.  You can use either of these two free apps, GrandPerspective  or OmniDiscSweeper, to find the largest files on your drive so you can determine if they can be deleted or moved to an external HD for storage.  

Welcome ! The two Applications provided in the earlier post will assist in identifying the lager files that are under your direct control and thus decide if they are be kept or removed.

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

Good luck and am guessing the internal drive is running low on space and is the 128 GB SSD size ?