Starting Minimserver - total beginner

[simoncn]

You don't need to install MinimServer on your NAS as well as on Windows 10. What type of NAS is it? If the NAS supports MinimServer (QNAP, Synology or ASUSTOR), installing MinimServer on the NAS is the best approach.

You can't use a Windows path (M:) for the content directory setting on the NAS. For a QNAP NAS, see this page. For a Synology NAS, see this page. For an ASUSTOR NAS, see this page.

With this approach, you need MinimWatch and Java on Windows 10 (not MinimServer). See this page for installation instructions.

You don't need either MinimServer or Java on your tablet. Instead you need a UPnP control point such as BubbleUPnP (available from the Android Play Store).