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The smallest SD flash memory card. Introduced in 2005 and widely used in smartphones, tablets, and other handheld devices, microSD is electrically and software compatible with the full-size SD card. Subsequent versions, including SDHC (High Capacity) and SDXC (Extended Capacity), greatly increased storage.

By 2018, 512GB SDXC cards were in production. In the past, SanDisk referred to microSD as TransFlash (T-Flash). See SD card and gruvi card.

The Smartphone Slot
The microSD format is widely used in smartphones and tablets. To gain access to the microSD slot in this Android phone, the back of the case is removed.

Adapters Make microSD Universal
This adapter allows a microSD card to plug into a full-size SD slot. Adapters for miniSD and USB are also available. The half-gram microSD is .59 x .43 inches (15 x 11mm).

A Tad Smaller
Remember floppy disks? It would take 21,000 of them to hold as much storage as this 32GB microSD card, which costs about the same as 10 floppies did. See floppy disk.

Hard to Believe
In 2018, this 512GB microSD card held approximately 800 times as much data as a 17-pound hard drive in the early 1990s. See hard disk.

Hard to Believe
In 2018, this 512GB microSD card held approximately 800 times as much data as a 17-pound hard drive in the early 1990s. See hard disk.
References in periodicals archive ?
Huawei has seemingly prepared for the microSD card outage by developing its own, just like potentially developing an operating system to replace Android on their devices.
SanDisk has launched its 1TB UHS-I microSD card, along with a 512GB variant of the same.
Supported by Western Digital's WD Purple hard drive, WD Purple microSD cards, and the Western Digital IX EU312 UFS EFD, the device analytics technology provides system integrators and end users unprecedented ability to proactively manage storage on their surveillance systems.
With the A1 rating, the latest microSD cards allow smartphones
SanDisk trumpets its A1 speed rating, saying: "Rated A1, the SanDisk UltraA microSD card is optimized for apps, delivering faster app launch and performance that provides a better smartphone experience."
This new SanDisk microSD card provides consumers with the freedom to capture, save and share photos, videos and apps and enjoy offline content, all without worrying about storage limitations.
The latest version of HD Sentinel program, in addition to HDD & SSD, can now monitor MagicRAM's Industrial Grade SLC SD & microSD cards health status and report all S.M.A.R.T (Self-Monitoring, Analysis and Reporting Technology) values.
Dubbed as the SanDisk Ultra microSDXC UHS-I, it is the first microSD card to comply with the SD Association's Application Performance Class 1 specification.
"With the upward trend of consumers using high-performance, high-capacity mobile devices, our new, V-NAND-based 256GB microSD card solution allows us to deliver the memory card consumers have been craving," said Un-Soo Kim, senior vice president of brand product marketing, memory business at Samsung Electronics.
With its higher read and write speeds of up to 95MB/s and 90 MB/s respectively, the PRO Plus SD cards and microSD cards satisfy both UHS-I Speed Class 3 (U3) and Class 10 performance levels.
Recognizing that microSD cards are now a common way to increase storage on mobile devices, ADATA created the OTG microReader--a small device that helps users move data from a microSD card to other devices.
* Free insertion and withdrawal of the microSD card, which eliminates the need to turn off power or remove the battery.