A microSD slot on your phone means you are able to increase your phone's storage with ease. With Galaxy S10e, S10, S10+, and Note9 came support for microSD cards up to 512GB, giving some Galaxy smartphones a combined storage capacity of 1TB or more.
To insert a microSD card, first eject the SIM tray by using the ejection pin. Insert the pin into the hole on the SIM tray to eject. Then take out the SIM tray, place your microSD card onto the tray, and put it back into the phone.
Support for 512GB microSD cards is available on Galaxy S10e, S10, S10+, Note9, S9, S9+, Note8, and S8+.
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* MicroSD card sold separately. Availability may vary depending on country and manufacturer.