[For Camera Information, Check Camera Notes]In 1999, SanDisk, Panasonic, and Toshiba jointly launched the SD memory card. The following year, the SD Association was established, and as of today, there are over 700 member companies and 9 major versions.(The official version “family tree” can be viewed briefly)For the vast majority of consumers, the version updates of SD cards mainly affect the maximum capacity, bus/transfer speed, and speed class. ET has created a concise summary table, where the gray text indicates unimportant content(outdated or not implemented), while the red text indicates the content that is currently more relevant to everyone.(Carefully check the red text in the condensed version)About device(camera/camcorder/card reader) and storage card compatibility:CapacityDevices that support large capacity storage cards can also use smaller capacity cards.* However, some Sony cameras may limit video recording formats when using 32GB or smaller capacity cards.Maximum SpeedThe maximum speed depends on the lowest speed in the device/storage card, for example, a body that supports high-speed cards + a low-speed card will ultimately be low-speed, and a body that supports low-speed cards + a high-speed card will also ultimately be low-speed — only a body that supports high-speed cards + high-speed cards can achieve the desired speed.* SD Express cards are only backward compatible with UHS-I, and currently, there are no cameras/camcorders that support them, so there is no need to purchase them.** Currently, only card readers can support 200MB/s UHS-I overclocked cards; when used on cameras/camcorders, the actual speed of all UHS-I storage cards does not exceed 104MB/s.▲ Currently, there are no cameras/camcorders that can utilize this ADATA SD Express card.▲ The card above is marketed with an outrageous claim (the UHS-I card marked V60 does not comply with SD Association standards)Speed ClassUHS-I supports a maximum of V30 — UHS-I overclocked cards, even with 200MB/s speed, will not receive V60 / V90 markings;UHS-II is the only one that can potentially support V60 / V90 — there have been UHS-II V30 cards and high-speed UHS-II cards that did not obtain V60 / V90 markings, which can affect the recording format of cameras(of course, these cards have also basically exited the public eye).– END –▶▶ More exciting content awaits your attentionIn addition to the WeChat public account “Camera Notes” (xjbiji) that you are currently viewing, we also have a public account dedicated to sharing beautiful bird photography and equipment called “Fun Bird Photography” (qpbird) and another for sharing experiences with computers and general digital products called “Yitu Technology” (etukeji).You can also follow us on Weibo @Camera Notes et, Bilibili @Camera Notes et, and Toutiao @Yitu Technology.