Well, this was unlucky (according to my calculations in the table I posted yesterday in GM toolbox 11 dice vs 9 is around 53% success chance, though that assumes limit is not involved, and when you do, that 35% chance to roll more than 3 hits from 9 dice is going to be common - Hmm, maybe I'll see if I can upgrade that spreadsheet with a configurable limit). Edit - Updated spreadsheet to allow a configurable limit. With limit 4, 11 dice vs 9 dice is a 46% success chance. Raising limit to 6 gives a 53% chance.
If it were a decker, you'd be able to get to 6 limit for hack on the fly with the lowest deck (if you put the 4 in sleaze, and Exploit program), as a Technomancer I'd be wanting Intuition pretty high, as it's not only your limit here, but also figures into a lot of actions and defences.
I'm not 100% sure whether you have to hack into the commlink and then the file, or whether you can just see the file and hack it directly, if the latter. It'd need Matrix Perception, as you only automatically spot devices within 100m, and then you'd be trying to add one mark, disarm databomb (if any), remove the file protection (if any) with Crack File and then edit the file with Edit File. However, as a Technomancer you could instead just use Matrix Perception to spot the file, then Puppeteer (needing 2 hits) to get the device to send you the file (assuming the person isn't using the commlink, as then it becomes a Persona and you can't use Puppeteer). Or if you wanted to do it the decker way, use Diffusion of Firewall first to reduce the Commlink's firewall. (Note, this is just from a quick look at the rules, I've not played a Technomancer)