File Sizes

• A file size is the measure of space a file takes on a storage medium such as a computer hard drive.
• The basic unit used in computer data storage is called a bit .
• 8 Bits is equal to 1 Byte.

• Bit: A Bit is a value of either a 0 or 1.
• Byte: 1 Byte = 8 Bits

Name	Symbol	Measurement in Bytes
KiloByte	KB	2^10
MegaByte	MB	2^20
GigaByte	GB	2^30
TeraByte	TB	2^40
PetaByte	PB	2^50
ExaByte	EB	2^60
ZettaByte	ZB	2^70
YottaByte	YB	2^80

File sizes are limited by the file system that is used and its implementation. Here are details on the common file systems:            

	FAT16	FAT32	NTFS
Maximum File Size	2 32 - 1 bytes	2 32 - 1 bytes	2 64 - 1 KB
Maximum Volume Size	4 GB	32 GB	2 64 clusters
Files Per Volume	2 16	2 22	2 32 - 1