Glad you got it working.

As to why the corruption - you said you switched it off for being unresponsive, didn't you? Powering down or rebooting a device while writing to a storage medium is taking place is pretty much a guarantee for FS corruption. Some file systems are more robust than others, but this kind of treatment will be a challenge to all of them. Which is by the way the main reason for having to "safely remove" a USB memory stick, for example. To get the OS a chance to finish all writes and make sure the FS is consistent.