My mac system ask for upgrading to mac OS big sur, down loaded my system into my system after deleting many apps, and videos, now downloaded the software and for installation it is asking 32 GB space, 97.03 is used by the system files, 12.7 GB by macOSbig sur, which is not possible, what should I do now, can I instal into an external hard disc, In which external disc should be available all time to operator the mac.
