Editing Flash memory (section)

==Flash file systems==
{{Main|Flash file system}}

Because of the particular characteristics of flash memory, it is best used with either a controller to perform wear leveling and error correction or specifically designed flash file systems, which spread writes over the media and deal with the long erase times of NOR&nbsp;flash blocks. The basic concept behind flash file systems is the following: when the flash store is to be updated, the file system will write a new copy of the changed data to a fresh block, remap the file pointers, then erase the old block later when it has time.

In practice, flash file systems are used only for [[memory technology device]]s (MTDs), which are embedded flash memories that do not have a controller. Removable flash [[memory card]]s, SSDs, [[eMMC]]/[[Universal Flash Storage|eUFS]] chips and [[USB flash drive]]s have built-in [[Flash memory controller|controller]]s to perform wear leveling and error correction so use of a specific flash file system may not add benefit.