SanDisk Extreme Pro SD UHS-II USB-C Reader

A memory card reader is a device for accessing the data on a

memory card A memory card is an electronic data storage device used for storing digital information, typically using flash memory. These are commonly used in digital portable electronic devices. They allow adding memory to such devices using a card in a so ...

such as a

CompactFlash CompactFlash (CF) is a flash memory mass storage device used mainly in portable electronic devices. The format was specified and the devices were first manufactured by SanDisk in 1994. CompactFlash became one of the most successful of the e ...

(CF),

Secure Digital Secure Digital, officially abbreviated as SD, is a proprietary format, proprietary non-volatile memory, non-volatile Flash memory, flash memory card format developed by the SD Association, SD Association (SDA) for use in portable devices. The s ...

(SD) or

MultiMediaCard The MultiMediaCard, officially abbreviated as MMC, is a memory card standard used for solid-state storage. Unveiled in 1997 by SanDisk and Siemens, MMC is based on a surface-contact low pin-count serial interface using a single memory stack subs ...

(MMC). Most card readers also offer write capability, and together with the card, this can function as a

pen drive A USB flash drive (also called a thumb drive) is a data storage device that includes flash memory with an integrated USB interface. It is typically removable, rewritable and much smaller than an optical disc. Most weigh less than . Since first ...

. Some

printers Printer may refer to: Technology * Printer (publishing), a person or a company * Printer (computing), a hardware device * Optical printer for motion picture films People * Nariman Printer ( fl. c. 1940), Indian journalist and activist * Jame ...

and

Smartphone A smartphone is a portable computer device that combines mobile telephone and computing functions into one unit. They are distinguished from feature phones by their stronger hardware capabilities and extensive mobile operating systems, whic ...

s have a built-in card reader, as do most

personal computer A personal computer (PC) is a multi-purpose microcomputer whose size, capabilities, and price make it feasible for individual use. Personal computers are intended to be operated directly by an end user, rather than by a computer expert or tec ...

s and the majority of

Tablet computer A tablet computer, commonly shortened to tablet, is a mobile device, typically with a mobile operating system and touchscreen display processing circuitry, and a rechargeable battery in a single, thin and flat package. Tablets, being comput ...

s. A multi card reader is used for communication with more than one type of flash

. Multi card readers do not have built-in memory capacity, but are able to accept multiple types and styles of memory cards. Memory card readers, unlike smartphones, telephones and other devices, such as cameras and digital cameras, allow formatting in a file system other than FAT (FAT16, FAT32, exFAT) to NTFS in Windows, ext, ext2, ext3 in Linux or HFS, HFS + for Mac OS. Smartphones or other devices like cameras format them only in FAT. Internal card readers are usually connected to internal USB 1.1 / 2.0 / 3.x ports The number of compatible memory cards varies from reader to reader and can include more than 20 different types. The number of different memory cards that a multi card reader can accept is expressed as x-in-1, with x being a

figure of merit A figure of merit is a quantity used to characterize the performance of a device, system or method, relative to its alternatives. Examples *Clock rate of a CPU * Calories per serving *Contrast ratio of an LCD *Frequency response of a speaker * ...

indicating the number of memory cards accepted, such as 35-in-1. There are three categories of card readers sorted by the type and quantity of the card slots: single card reader (e.g. 1x SD-only), multi card reader (e.g. 9-in-1) and series card reader (e.g. 4x SD-only). Some kinds of memory cards with their own USB functions do not need the card reader, such as the Intelligent Stick memory card, which can plug directly into a USB slot. The USB device class used is . Modern UDMA-7 CompactFlash Cards and UHS-I Secure Digital cards provide data rates in excess of 89 MB/ s and up to 145 MB/s, when used with memory card readers capable of USB 3.0 data transfer rates. As of 2011, Secure Digital memory cards received an additional option of a UHS-II bus interface. It increased the maximum data transfer speed to 312 MB/s.https://tenpire.com/beginners-guide-to-choosing-microsd-and-sd-memory-cards/ SanDisk-memory-card-reader.jpg, USB card readers like this one typically implement the

USB mass storage device class The USB mass storage device class (also known as USB MSC or UMS) is a set of computing communications protocols, specifically a USB Device Class, defined by the USB Implementers Forum that makes a USB device accessible to a host computing device ...

Cfcrusb2.jpg, Generic

card reader with high-speed storage via USB2.0 FDD-Cardreader.jpg, Cardreader combined with

floppy disk A floppy disk or floppy diskette (casually referred to as a floppy, or a diskette) is an obsolescent type of disk storage composed of a thin and flexible disk of a magnetic storage medium in a square or nearly square plastic enclosure lined w ...

drive NV-PE150PSU CF Card Reader 91689 (cropped).jpg,

PCIe PCI Express (Peripheral Component Interconnect Express), officially abbreviated as PCIe or PCI-e, is a high-speed serial computer expansion bus standard, designed to replace the older PCI, PCI-X and AGP bus standards. It is the common mo ...

eSATAp In computing, eSATAp (also known as Power over eSATA, Power eSATA, eSATA/USB Combo, eSATA USB Hybrid Port/EUHP) is a combination connection for external storage devices. An eSATA or USB device can be plugged into an eSATAp port. The socket h ...

controller card with

memory card reader

References

{{DEFAULTSORT:Memory Card Reader Solid-state computer storage media USB

See also

References