hi how can I remove 'other' storage from my mac?

You cannot manage the "other" category as the OS and system manage it. The amount shown will fluctuate all the time. If you haven't run a Time Machine backup lately, do so - other may include snapshots which are small backups kept on your Mac until they can be transferred to the backup.

Here is Apple's expanation:

https://support.apple.com/en-gb/guide/system-information/syspf9b375b9/mac