When I send music or video via bluetooth to my blackberry q10, I dont know were it save them, I have checked my file manager I cant find them and there is no memory card on my phone. I dont know were it save file now?
If you are using a BlackBerry 10.3 OS in your phone, you should see it in downloads folder. But if you have an OS lower than that I suggest that you go to BlackBerry world and search for Ghost Commander. It's a file manager. Locate /external_sd and in the sub folder, you will find a folder called /downloads.
Open and you will find all the hidden files and thereafter you can move it to a favorable folder.