What can I upgrade on the MSI Prestige 15 A10SC?
Upgrading notebooks / laptops is not really possible as they are not intended for this.
I think the specifications of your model are still pretty up-to-date and absolutely top for a notebook.
In addition, you do not say where you have problems which would explain an upgrade.
You could - if it is about the GPU - upgrade your GPU by connecting a normal graphics card via PCI-E adapter.
https://www.notebookcheck.com/...702.0.html
The maintainability is very good, because after removing the base plate you have access to both RAM slots, both storage bays, the WLAN module and the battery.
Just wanted to look into the future. Don't even think that it will be necessary.