An SD (Secure Digital) card slot is an expansion slot that allows you to read and write data from and to an SD card. Both slot and card are available in three varied sizes, full-size SD, Mini SD, and MicroSD. The slot can be essential if you are a content creator who frequently gets photos and videos from digital camera memory cards.
The Dell Latitude 5521 comes with a built-in microSD card slot. The slot is on the right side of the device.
To help you identify which type of SD card is compatible with your laptop, this is the size comparison between the full-size SD, miniSD, and microSD cards. Just so you know, the microSD, most of the time, comes with an SD adapter, which means you can use it on any smartphone, tablet, digital camera, or laptop as long as they have an SD, miniSD, or microSD slot.