Hard Reset and Storage Card

[focd1]

This is a noob question. Hi, I read the manual and did a hard reset. Then I read the manual and it says that, "Factory reset will not erase the data and files that are on the storage card." I am worried because I took some pictures on the HTC THUNDERBOLT  and also browsed websites and had the autofill feature on. I also saved some passwords and downloaded OTHELLO on the phone. So does this mean that all that I have done was saved on the storage card? If so, then what's the point of doing a hard reset if all you ever do is saved on the storage card and not on the phone's internal memory? I am worried that my personal info/activity might be leaked out as I have already sold the phone to a stranger. Please help me. Thanks.

[Ann154]

Pictures are stored on the sd card..

Browsing history, passwords, applications on stored in the phone's internal memory and will be deleted when a factory reset is completed.