Droid RAZR Memory Card Encrypted just by Screen Lock
I only used the screen lock with a 4-digit pin, & when my battery went down to 0% overnight, I recharged it & when the phone rebooted, it came up with a prompt to enter a password to decrypt storage. I never selected the options to encrypt device or memory card since I didn't want to deal with remembering a password to get to my data quicky. I had to use the 4-digit pin to decrypt & access the phone. Before the battery went down, the screen lock came up overlayed onto the screen, & upon entering the pin, I could get to my phone & data. After I got access to my phone, upon checking the security settings, the device & memory card encryption boxes were checked. It did it on it's own when the phone went down to 0% or just by the screen lock.
A week later my sound went out on the phone & yes the volume was up. I called Verizon Tech Spt & when the 1st option of doing a cache partition wipe didn't work, he suggested resetting to factory default. I told the Tech about what happened the week before. He told me to save my data onto the memory card, then I powered down, took out the memory card, then did a factory reset. After adding the memory card & rebooting the phone, I was prompted with "SD Card has been secured by another device & can't be accessed unless formatted." Then another msg came up with "SD Card Password Protection: Failed to verify SD Card security settings. Encrypted content isn't accessible." Verizon suggested trying to upload to my PC to see if it was visible.
I put the memory card in my card adapter & tried to upload to my PC. It uploaded half of the pics & videos, but the others weren't accessible. I couldn't access my contacts file or SMS backup file.