I don't know that anyone deliberately tries to have a small hard drive. The first hard drive, the IBM 350, was about 4 MB. Physically, though, it weighed about a ton and had to be moved with forklifts. I believe the IBM 1311, released later, may have had a lower capacity (it was physically the size of a washing machine).
The physically smallest conventionally used hard drives are called "Microdrives." They measure 1.7 by 1.2 by 0.2 inches, and are available in capacities ranging from 170 MB to 8 GB.
Size has two meanings when we're talking about hard drives, or any storage device for that matter. Common sizes in terms of storage space would be, 700GB to 1TB, but this figure is constantly changing. Common sizes in terms of physical size would be 2.5", and 3.5" for PATA and SATA standards.
Answer
The real answer is this is a moving target. You can buy a 1-2 Terabyte (1000 Gigabytes) for $50-60 today, so 100GB would only be found on a very old computer. I don't think you can even buy a computer today with that small a drive; the closest is a netbook with a 160GB drive.
How much money do you have?
Today, 500 GB to 1000 GB should be enough for a PC, and they are reasonably priced in the $150 - $300 range depending on brand, etc.
Tomorrow, the capacities will go up and the $ price will remain the same or go down.
1mb
40 gb
1mb
This was a 6.4 GB hard drive.
The classic hard drive has the highest capacity and lowest cost per megabyte. The only thing it lacks is easy portability.
Hard drive capacity can be measured in either gigabytes or terabytes. It depends on the amount of capacity it has. Hard drive capacity usually is defined by the largest unit of storage. For example a 2 TB drive usually is not referred to as a 2,000 GB drive.
The original iPod's hard drive capacity was 5GB and 10GB. Future releases saw increases to the capacity the hard drive to accommodate movies, TV shows and apps. Currently, the largest capacity hard drive for an iPod is 160GB, on the iPod Classic.
GIGABYTES
1600GB
120 GB is the highest ATA hard drive capacity. There are many models of computers which can handle this capacity. Laptops are designed to handle 120 GB as well.
A modern hard drive is measured in Gigabytes (GB) 1GB = 1024MB (Megabytes)
The maximum capacity of a hard drive dock depends on what dock is used. The capacity can range anywhere from 2.5 Gbps. to 6.0 Gbps on a higher quality docking station.
No.
Megabytes, Gigabytes or Terabytes.