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There'southward a wide variety of SD cards available on the market place, with the most mutual being the standard SD card and the microSD card. They're mostly used with digital cameras as well every bit with a few less common devices, like multimedia players.

But even within the most common SD card formats, there'due south a lot of variety, and it's of import to know most the differences in gild to make the best choice when yous're ownership an SD card.

i.What's the departure between SD, SDHC, SDXC, and SDUC?

People have an increasing demand for higher capacity SD cards with higher file-transfer rates. So over the years, there take been a host of new SD versions to help come across these demands. These include SDHC (SD High Capacity), SDXC (SD eXtended Capacity), and SDUC (SD Ultra Capacity). See the table beneath for total details.

SD card version	SD	SDHC	SDXC	SDUC
Minimum capacity	8 MB	2 GB	32 GB	2 TB
Maximum capacity	2 GB	32 GB	ii TB	128 TB
File arrangement	FAT 12/sixteen	Fat 32	exFAT	exFAT
Year of release	1999	2006	2009	2018
SD specification	SD 1.0	SD two.0	SD three.0	SD 7.0

2.What'due south the departure between UHS-I, UHS-2, UHS-3, and SD Express?

"UHS" is the abbreviation of "Ultra-Loftier Speed". UHS memory cards generally take faster reading and writing speeds. This standard is formulated by the "SD Card Association", a non-profit organization, and there are several versions:

• UHS-I (the kickoff generation of ultra-loftier speed) was released in 2010, and the theoretical transmission speed can accomplish a maximum of 104 MB/s. It's suitable for daily apply, such every bit taking photos and recording videos.

• UHS-II SD cards tin reach 312 MB/s which is suitable for taking high-definition video and high-definition pictures in 4K.

• The UHS-3 specification was released in early 2017, doubling the previous UHS-II rate and achieving unprecedented transfer speeds of upwards to 624 MB/s. It's suitable for devices that need really fast data transfer, for instance, professional cameras used to record 8K, 4K, and 360-degree video.

• SD Express offers the fastest data transfer rates of upwards to 3940 MB/s using the PCIe Gen.four interface and NVMe application protocol. Information technology supports dual-channel reading, and the interface speed is close to four GB/s. Unfortunately, there aren't any devices that have adopted this standard notwithstanding, just in the future, it should mean we tin can enjoy much faster data transfer speeds.

Coach Interface	Carte Type	Bus Marker	Charabanc Speed	Spec Version
Default Speed	SD, SDHC, SDXC and SDUC	—	12.5 MB/s	1.01
High Speed	SD, SDHC, SDXC and SDUC	—	25 MB/southward	ane.1
UHS-I	SDHC, SDXC and SDUC		50 MB/south (SDR50, DDR50) 104 MB/south (SDR104)	3.01
UHS-Two	SDHC, SDXC and SDUC		156 MB/due south Full Duplex 312 MB/s Half Duplex	four
UHS-Iii	SDHC, SDXC and SDUC		312 MB/southward Full Duplex 624 MB/s Full Duplex	6
SD Limited	SDHC, SDXC and SDUC		985 MB/southward PCIe Gen.3 × 1Lane	7
			1970 MB/s PCIe Gen.four × 1 Lane PCIe Gen.3 × 2 Lane	8
			3940 MB/sPCIe Gen.four × 2 Lane

3.How to choose the correct card reader for you？

It's of import to make sure that the card reader you're ownership is uniform with your memory cards. In addition, you lot should choose your memory carte du jour based on your personal needs. If it's for daily employ, a microSD carte du jour or SD menu with UHS-I will get the job done. If you demand something with college performance, then a UHS-2 SD menu would be a better choice.

Some other affair to consider is that since 2016, Apple has switched to USB-C ports on its laptops, and has stopped including a card reader as standard. This ways that MacBook users will need to purchase an adapter or a USB-C to SD card reader.

If you need something today, and so Anker has a couple of expert options.

First up is our ii-in-1 SD 3.0 card reader which supports both microSD and SD cards, and tin can achieve speeds of up to 104 MB/s.

The second is the 2-in-ane SD 4.0 card reader which also supports both microSD and SD cards but has a much higher top speed of 312 MB/due south.

Source: https://us.anker.com/blogs/hubs_edu/everything-you-need-to-know-about-sd-cards

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