I have bought an adaptor to convert a Male USB to Male mini-USB & been switching the eUtility's USB tab to Card reader, & after no luck, installed Ratoc systems' WM5 driver (but this I think needs a specific 250/255 PXA cpu; the Mio is PXA270 it appears). Perhaps it is not possible - I thought I would reach storage nirvana fairly easily... but so far today, no luck.
I have tried this with a Toshiba e800 (WM2003; have not bothered to go to SE) via it's presentation add-on, & it works a treat - although my Ipod packs up after 30 secs whilst streaming video (I think it asks the e800 to charge from it, duh, & both machines shutdown).
I am still greatly enjoying the A701 and glad I took the plunge.
PS Modaco is outstanding (my most obvious statement of the day, already before lunch)
PPS thanks for the post on in-call volume - verify both sliders set to high; will try. I do like how it cycles through vibrate & off as well; much better.