Dell OptiPlex Small Form Factor Plus 7020 Owner's Manual page 8

Indicates the power-supply state.
2. SD-card slot (optional)
Reads from and writes to the SD card.
3. Hard-drive activity light
The activity light turns on when the computer reads from or writes to the hard drive.
4. Universal audio port
Connect headphones or a headset (headphone and microphone combo).
5. USB 2.0 (480 Mbps) with PowerShare port
Connect devices such as external storage devices and printers. Provides data transfer speeds of up to 480 Mbps.
NOTE: PowerShare enables you to charge your USB devices even when your computer is turned off.
NOTE: If a USB device is connected to the PowerShare port before the computer is turned off or in hibernate state,
you must disconnect and connect it again to enable charging.
6. USB 2.0 (480 Mbps) port
Connect devices such as external storage devices and printers. Provides data transfer speeds of up to 480 Mbps.
7. USB 3.2 Gen 2x2 (20 Gbps) Type-C port
Connect devices such as external storage devices and printers. Provides data transfer speeds of up to 20 Gbps.
NOTE: This port does not support video/audio streaming.
8. USB 3.2 Gen 2 (10 Gbps) port
Connect devices such as external storage devices and printers. Provides data transfer speeds of up to 10 Gbps.
9. Slim optical drive (optional)
Reads from and writes to CDs and DVDs.
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