I am not sure what occurred with the installation of BUILD 16275! It downloaded and I installed as usual, thinking that all would go as it usually does. Upon signing in after the completion of installation, I found all of my APPS from the previous build in place. HOWEVER, every folder of personal data, documents, pics, movies, and music ARE GONE! My Microsoft Edge settings are gone as well. While I understand the risks being in the fast ring, I certainly did NOT expect this. I will have to rewrite some of the lost documents and find some of the movies and music that was lost. The pics are not recoverable.
I have not tried rolling back to the previous build yet, as I am not sure that this will restore the missing files.
SO, I am writing to give you all the heads up on this Build. I have been an insider for two years and still enjoy the program. I had backed most files onto One Drive, but had not done so in a while BECAUSE your upload speeds are horribly slow. In any case, my PC is operating as if "new" LOL!