==== File Headers ====
Cassette files are divided into 2KB blocks (then subdivided in 256-byte segments+ CRC), each block being preceded by a 64-byte header.
AMSDOS files are usually stored with a 128-byte [[AMSDOS Header]] (based on cassette header) but can also be headerless, depending on the contents of the file. Unprotected ASCII files do not have header.