Well it is going to depend on how your card and your phone were set up before.
If you had the card set up as "Internal" storage then you may well not be able to get anything off the card now. When that change is made, the card becomes encoded to that one device. When you reset that device, you remove the connection, making the data on the card unreadable.
Try pulling the SD card out, restart the phone and then put the card back in. With some luck, it will be able to read it again. However, if it can't, or it asks you to format it, then you won't be able to access the data.
One should always pull out any SIM and SD card before doing a "Factory Reset" or a "Hard Reset".