Once the PC is connected to the Android phone via a USB cable, you can access the SD card in your phone using the following steps.
If you select Don't Mount, then nothing happens, and if you want to mount it again, you have to disconnect and reconnect the Android to the PC.Alternatively, you can activate the Task Manager at this point to switch to another task and defer the decision to a later time, when you can activate the Task Manager system again to switch to the Android task to see this dialog again.
In 2017, with the release of Delphi 10.2 Tokyo, Embarcadero introduced a specialized implementation of the Observer pattern into the System.Classes unit. While it has been in the wild for 9 years, it remains a "hidden" architecture for many, primarily because it serves as the invisible engine behind LiveBindings. Other than live bindings, you can also use the Observer pattern as a way to update component settings to the Windows registry, an .ini file, or persist it elsewhere.
System.Classes