[Imp]

Simpler now computer storage space costs very little patch the program to its current version then back it up. When you patch the next version replace the backup with the new version. Now reinstaling just requires you to copy & paste it.
New system harddrives are 500GB plus nowadays & external ones for backup (you do dont you) are cheap nowadays. Or even a USB stick you can pick up 8 or 32GB ones for a few dollars nowadays if you shop around. They are fine so long as you dont carry them around in your pocket & hit them with a charge of static electricity.
The games are only about 500mb uncompressed so will fit on most anything.