I Have the same problem and I posted in this forum too.
What is you StoreMI version? 2.0?
Please see if it's the same problem as yours: AMD STOREMI freezing disk when opening programs (100% disk usage)
My storeMI version is 1.0 which I think this problem is deprecated. Turns out I just removed storeMI and installed Windows in normal mode(without storeMI)
AMD really is bad at driver but I hope they will eventually improve
Yes. The version you use is obsolete.
It was provided by another company Enmotus (https://www.enmotus.com/amd) but AMD started supporting it only in March this year for its own version called StoreMI 2.0 (replacing Enmotus FuseDrive tecnology).
Have you tested the new AMD StoreMI 2.0 version?
AMD's support really falls short, but I hope the new version 2.0 will leave the BETA stage.