Aside from server cases the largest number of hard drives you can put into a case appears to be six.That would require an enormous power supply as well.The Lian Li Armorsuit PC-P80 comes with a 1000 watt power supply.
If the case has room to mount them - servers are a prime example of computer systems with multiple drives.
These days, a large business computer with most of the space filled with disk drives, or a multiprocessor supercomputer with a billion or more CPUs,
Most computer bags and cases have extra room for external drives, cables and cd's. Some higher models also have room for other materials such as writing tablets, etc.
A tower case
The Room in the Tower was created in 1912.
You can add as many harddrives as you want to. As long as there is enough room.
Depending on what you do with the computer and what else the room might be used for. Your best bet would probably be with putting the computer towards the wall to provide room to do other things.
There is not a room behind the clock tower.
The Hard drive
Hard drives are one of the most important elements of computers. They even make external ones for those who need more room. They were first invented by IBM.
Most religions have a room set apart from the main hall of worship. The local church hall is frequently used as a meeting room, or to hold a birthday party, or whist drives, etc).
the tower