This is a very premium business notebook that is a bit lackluster when it comes to upgradeability.
1. Remove the bottom plate
To get inside of this device, you need to undo 8 captive Phillips-head screws. Then, pop the bottom panel open, starting the prying process from the hinges.
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https://laptopmedia.com/highlights/inside-dell-latitude-13-7310-disassembly-and-upgrade-options/