On my old windows-pc I created a database of my games on fritz 11 which I then uploaded to googledrive. The database is a .cbh file. My old computer broke and I'd like to re-open this database. As I have a mac, I got my roommate to download chessbase reader and sent him the database, but when trying to open it the message appeared
"new-database.cbh is not a database".
Does anyone know why this might have happened? Can anyone suggest something?