How did you try flashing 6.2?
Try USB flash or send the zip file to medi/hdd/images
On box Blue button flash online then local and choose devices goto you're hdd then images folder and highlight the zip file then try to flash that.
i have a 3GB SD card i select the hdd option for the backup it goes through the process of backing up but at the end it gives the kernel messageIs the storage device initialized?