Android Cannot Access SMB

Hi, folks. Pretty newb to the whole networking of Kodi thang, but a bud helped me set-up stuff so I could route my external HDs through my desktop (Win 7), and access them via my android devices, but everything went to poot last eve. I’ve two android boxes and one tablet, and now none of them will connect to said PC. They all seem to see it fine, but can’t access anything from it. It’s all set to non-password, read-write ok, and it was working grand until just yesterday. Just wondering if anyone else has encountered this. Cheers.

Edit: I’ve likely left out somethings that might help anyone help me with this, so just remind me if you can.