Always format the internal drive if it shows up blank before dragging your files over—it's a common fix for "failed" updates.
On the device's "About" page, ensure the device is recognized by the FNIRSI PC software. dsotc2 firmware link
It wasn’t a direct download. Instead, a plaintext page: “You’re not looking for firmware. You’re looking for what the firmware was hiding.” Always format the internal drive if it shows
Do not download .bin files from random Bitbucket or Mediafire links. We have vetted the following sources. dsotc2 firmware link