u/Accurate_Wasabi6768

Disk Full - help!

I am a complete novice and only mildly techy so I need absolute dummy/idiot level advice please you knowledgeable ms wizards you!

Microsoft Surface Pro.4 bought 4 years ago reconditioned by Backmarket etc.

Worked great until early Jan this yr.

I recently bought a 128 GB SD card and installed it but cannot seem to shift anything to it because I can't see what to shift and where or how.

I have never done this before.

Could someone please tell me step by step what I can do to stop the disk full messages and to start using it normally again?

Thanks 😊