Secure Digital (SD) cards are non-volatile memory cards used in portable devices and adopted by over 400 brands for more than 8,000 models. Floppy disks store data on thin magnetic disks sealed in rectangular plastic carriers, while compact discs have a smaller diameter and capacity than standard CDs. CompactFlash storage devices contain flash memory in standardized enclosures and were first developed by SanDisk in 1994. DVD-RW discs provide rewritable optical storage at DVD capacities, though smaller Mini DVD-RWs hold less data.

2.  Secure Digital (SD) is a non-volatile
memory card format developed by the
SD Card Association (SDA) for use in
portable devices. The SD technology is
used by more than 400 brands across
dozens of product categories and more
than 8,000 models.

4.  A floppy disk is a disk storage medium
composed of a disk of thin and flexible
magnetic storage medium, sealed in a
rectangular plastic carrier lined with
fabric that removes dust particles. They
are read and written by a floppy disk
drive (FDD).

6.  Mini CDs, or “pocket CDs” are CDs with a
smaller diameter and one third the
capacity.

8.  CompactFlash (CF) is a mass storage
device format used in portable
electronic devices. Most CompactFlash
devices contain flash memory in a
standardized enclosure. The format was
first specified and produced by SanDisk
in 1994.[4] The physical format is now
used for a variety of devices.

10.  A DVD-RW disc is a rewritable optical
disc with equal storage capacity to a
DVD-R, typically 4.7 GB. The format was
developed by Pioneer in November 1999
and has been approved by the DVD
Forum. The smaller Mini DVD-RW holds
1.46 GB, with a diameter of 8 cm.