A collection of 8 bits is called a

A collection of eight bits is called a byte.

A word is a group of bytes the processor handles at once, larger than a single byte.

A file is a named collection of data, far larger than a byte.

A folder holds files and is not a memory unit at all.

One byte can store a single character such as a letter or digit.

A nibble is half a byte, made of just four bits.