It's difficult to give you a size based on the amount of hours you have. A lot depends on not only the type of compression but the settings used during compression as well. I've seen people back up their bluray disc to a 50GB image (no compression) or a <2GB file.
Generally, given an mp4 compression, the following holds true: SD = 500MB/hour, 720p HD = 1.5GB/hour, 1080p HD = 4.5GB/hour. Again, this can vary wildly, but those tend to be the average results assuming a balanced space/quality compression.
SD: 700H * 0.5GB/H = 350GB
HD: 200H * 1.5GB/H = 300GB
1080p: 200H * 4.5GB/H = 900GB
So assuming your collection doesn't grow and it has 'average' compression, a 2TB HDD will do you fine. A 3TB HDD will take care of your current needs, give you some head room and (last I checked) provide the best price/space ratio currently available. 4TB will give you the biggest single discs currently available.
Originally Posted by knightsilver
Well, till I can afford $1K just
for a proper raid card and drives.........option 1:
OS_Western Digital 4TB SATA $266
Backup_WD My Book 4TB USB 3.0 $150option 2:
OS_WD 2.5 Black 500 GB $72
Media/Files_Western Digital 4TB SATA $266
Backup_WD My Book 4TB USB 3.0 $150
You may want to look into booting from a USB drive or a very small, cheap SSD. That will keep the OS seperate, but once loaded a file server barely needs the OS drive anyway.
Also how come your USB 4TB drives are so much cheaper? One might consider just buying two of those and turning one of those external discs into an internal one