Ok I'll go over the basis for the time spent on watching anime with the following numbers.
Figuring each anime is 20 minutes (forgo the op/ed)
Each anime can fit 3 times in a single hour
Each day holds 24 hours so multiply the hours 24 with the episodes INSIDE an hour which is 3 and you end up with 72 which is the total number of episodes PER DAY
Each week has 7 days multiply the days (7) with the number of episodes per day (72) you come up with the number 504 which is the number of episodes PER WEEK
Each week has 504 episodes that last 20 minutes each so multiple 504 and 20 together and u get 10,080 minutes
as for me my total is just about 5 months exactly and now to translate that into hard drive space
504 episodes PER WEEK x the avg file size of 150mb's = 75,600mb's or 73.828125 gigs per week
http://www.convertunits.com/from/MB/to/GB is a handy converter (a calculator this simple cant be wrong)
i was extremely lenient with the file size might i add
peace..being correct is too fun