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8GB RAM on M3 MacBook Pro 'Analogous to 16GB' on PCs, Claims Apple
(www.macrumors.com)
This is a most excellent place for technology news and articles.
You see, it grows inverted exponentially. 6 GB equals about 22 GB. Your best option will be the 2 GB model which performs like 64 GB. If that still doesn't fit your needs you could always download additional RAM.