Restore back up from Drobo FS to IMAC

I need to know how to restore a “Time Machine” back up file (.sparsbundle) from a Drobo FS to my IMAC. I have tried various things to no avail. Pleas advise

hi greg, i do not have a mac or fs though there is a popular site called pondini which has a lot of information about time machine, and maybe some useful info could be found there in the meantime until another mac user could post back for you.