Is 99.66 MB a large file size?

no not really, its just under a gigabyte which pretty much every computer thee days can handle no sweat, if ure downloading it from the net and you have limite bandwith, it will use up a chunk of that, and if ure on dial-up you be there for days downloading it lol, hope this has helped, im no computer geek but thought i cld help nath

99.66 MB is nowhere close to 1 GB. 1 GB = 1024 MB so he would have 924.34 MB left to reach 1 GB.