Kitoyi wrote:
How do I achieve this update from my MacOS
you do not paint a very big picture or concisely state the issue... I certainly do not understand "Is it ok to update to 100GB? "
SSD like to have 20-25% free storage at all times...you can do the math.
If your Mac is choked for free available storage then yes do some house cleaning
Empty your Trash — Delete files and folders on Mac - Apple Support
https://support.apple.com/guide/mac-help/delete-files-and-folders-on-mac-mchlp1093/mac
How to free up storage space on your Mac - Apple Support
https://support.apple.com/en-us/HT206996
See used and available storage space on your Mac
https://support.apple.com/guide/system-information/see-available-storage-space-syspf9b375b9/10.14/mac/10.15
User tip: "Other and What Can I Do About It ?"
https://discussions.apple.com/docs/DOC-5142
Try something like OmniDiskSweeper for a GUI to get a good look at itemized file size and location:
OmniDiskSweeper http://www.omnigroup.com/more