install macOS Big Sur - Space Issue

I am not able to install MacOS Big Sur as it says there is not enough space on my MacBook Air. I have the following questions :

  1. How important is to install MacOS Big Sur? I use my MacBook Air for Logic ProX and Final Cut Pro. Is it like I must switch to Big Sur ?

  2. Can I install Big Sur on an external Hard Disk ? If so, would it be like having 2 OS - one on the MacBook and another on external Hard Disk ?

Thanks in Advance for any suggestions!

Arun Vedula
install macOS Big Sur - Space Issue
 
 
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