I have an SD card in my Droid Global or Droid X, not exactly sure which model. I go to the files and click on the SD card instead of shred files and delete all of its contents. I then go to Privacy and click the Manufacturer Reset and also click the box to erase SD Card. My phone does a hard reset, and it turns back on.
After this process, what is readable on my SD card if someone took it and hooked up to a computer or anything else? If I hadn't done the reset, would someone be able to see text messages, phone calls, or browsing history if I've deleted them all from my phone?