Ever since I started using the new computer, I have been carefully watching the available memory of my hard drive. Therefore, I can confidently say that during the past week or so, the amount of memory left has always been about 405 or 406 GB.
Then, today I downloaded some software needed for my printers, so naturally the amount of available memory should only decrease. However, when I checked the number, it actually increased to 411 GB!
I know, this increase in memory probably didn't have anything to deal with the printers. Still, it was strange that it had just suddenly increase. Perhaps it was because some temporary files got deleted, or...?