Hi. I'm currently using Mavericks and I want to upgrade to El Capitan in the next few days. What I would like to know is if my mavericks' backups will work with the new osx (i.e., will I be able to access files on that backups?). Also, I would like to know if I can use the same hard drive to do the backups on El Capitan. If so, what do I have to do? Once in El Capitan, set that drive as the one that time machine should use? Will it erase the old ones? Thanks in advance!