C:\bb\Real Tracks doesn't have a Data folder, it contains only a long list of Real tracks and a text document. A Data folder does exist outside of the Real Tracks folder which contains 5 Folders,text documents, and BIN.files which I probably should leave alone..I was able to use the files that weren't playing by accessing them from the Style Picker Window, "Recently Used Styles" and they played fine from the xternal.Also I lost audio on the bluegrass demo..Again, I am running 2016 from a previously purchased xternal PG hard drive. I am hoping to eliminate any issues should I use this drive with other musicians.BAIB 2016 (aprox 100GB) resides on my desktop C:\drive which is fine at the moment. Thanks Video Track I will follow up on any suggestion you may have