1. Check compatibility with your mobile device Mobile phones and digital cameras that use SD cards are compatible with SD card readers. When using a USB Type-C or Lightning connector device, please select a card reader with a Type-C or Lightning connector. When using an Android tablet with a Type-A connector, an ordinary USB type A connector will do. However, the speed is slower than the Type-C and Lightning types. Please refer to the article What are the differences between Type-C and Lightning connectors?. 2. Check the connection type with the computer When connecting a USB type SD card reader to a PC, choose a product with a USB type connection. There are several connection types, such as USB type A and B, Mini B and Micro B. In the case of a USB type A connection, you can connect the card reader directly to the USB port of a PC, and if you have a USB hub, you can also connect it to a USB hub. When using a USB Type-C connection, use a USB Type-C cable. USB-C connection devices require a USB-C cable. If you use a Type-C hub, you can use a USB-C hub. When using a USB Micro B connection, use a Micro B cable. If the PC does not have a Micro B USB port, use a cable with a USB Micro B connector and a Type-A connector to connect the card reader to the Micro B connector. If the PC does not have a USB Type-A port, connect the USB Micro B connector to a USB hub. When using an HDMI connection, connect the SD card reader to the PC via an HDMI cable. In this case, you must have an HDMI port on the PC. In addition, if the PC has an HDMI port but does not have an HDMI input terminal on the monitor, you may need to purchase an HDMI connection cable. For the type of connection, you can check if you have an HDMI port. If the connection type matches, an SD card reader that supports HDMI can be connected. 3. Check the type of card and the read/write speed SD card readers have different read/write speeds depending on the type of card, such as SD, SDHC, SDXC and miniSD. If you want to read and write data at high speed, choose a card reader that supports high-speed transmission. High-speed transmission means high-speed data transfer. In order to transfer data at high speed, the type of the card reader is also important. It is recommended to choose a USB3.0 standard card reader. This is because the USB3.0 standard has a higher data transfer speed than USB2.0. There are some SD cards that can handle data transfer at high speeds, but SD cards that can handle high-speed data transfer are rare. Why shop on AliExpress 1.Lower Price: Aliexpress always provides customers with quality products at reasonable prices. In addition to low prices, there are always bonus activities such as discounts and coupons, so you can buy your favorite mini sd card reader related items without hesitation. 2.Various types: There are always a wide variety of items related to the popular mini sd card reader with Aliexpress, you don't have to worry about not finding the goods that interest you. 3.Full service: Aliexpress operators will patiently and thoroughly answer your questions before purchasing. And for after-sales service, any problem can be solved early. Delivery services are also mostly free or next day delivery. See more details about mini sd card reader in AliExpress Video Page.