It depends, 170 Megabytes in terms of hard drive space these
days is very little, with most HD's reaching up to 1 Terabyte. The
scale of Bytes goes as follows:
1 Byte is 8 Bits
1 Kilobyte is 1000 Bytes
1 Megabyte is 1000 Kilobytes
1 Gigabyte is 1000 Megabytes
1 Terabyte is 1000 Gigabytes
etc.
So in general terms, no, 170 Megabytes is not a lot, unless you
are talking about audio files and the like.