# Removable Storage

Partitions on removable storage:

* floppy disks – don’t have a partition table.
  * has a FAT12 file system as a single partition.
* memory cards – typically use DOS partitions.
  * FAT32 – max volume size 32 GB, max file size 4 GB.
  * exFAT (or FAT64) – max volume size 128 PB, max file size 128 PB.
* external hard drives.
  * DOS partitions are commonly sold already with an NTFS file system in place.

Optical disks:

* CDs – ISO 9660.
  * ISO 9660 is very strict about file names.
  * there are extensions (Joliet, Rock Ridge) to overcome these limitations.
  * there are also hybrid CDs:
    * ISO 9660 + Joliet.
    * ISO 9660 + Apple HPS.
  * bootable CDs for intel PCs can contain a DOS partition.
* CD-R.
  * use sessions, each one can be treated as a partition.
  * each time data is added to the CD-R a new session is created.
  * most OS only show the last created session.
    * on OS X it’s possible to see all sessions.
    * on Linux, it’s possible to manually mount previous sessions.
    * on Windows-specific software is required e. g. _Iso Buster_
