My Mi Box was running out of storage space, so I put a USB drive and migrated all the data to it. But, when I a try to install some app from Google Play, it says I have no storage space. I checked my storage settings and I can see that my Internal shared storage has 4 GB available, and all my data is on my USB drive... Well, I do have storage space, is that a bug or something? Ps: I'm using Android Oreo
Ran into the same issue a few days ago. I'm going to dig to see if I can find the culprit and report back if and when I do.