My own "SD Card Access Error":
The SDS200 was running fine. I rarely shut it off. It had been running fine all day. In the evening, I noticed things had gotten very quite. I took a look at the screen, thinking the radio has stopped on a "quite birdie", but alas, to my sorrow, I saw the "SD Card Access Error". Now what?
I turned that radio on and off a few times, but still kept getting the error. A few more manipulations, including removing the card and putting it back in the slot, but same error. Slow panic starts to set in. Gotta keep my head. I read this thread--- mixed solutions.
Opened one of my electronic parts drawers and sure enough, found two brand new Sandisk 32 cards. My laptop is having issues with the Internet (when it rains, it pours), so could not find the appropriate FAT/FAT32 formatting tool.
What the hay (as they say). Just stuck in the new Sandisk32 and the SDS200 booted up. But a new message--- told me to use Sentinel to Clear User Data. Took the new card out of the SDS and into the SD card slot of the laptop, used Sentinel to "locate it" on my laptop (make sure you check the option to Search All Drives in Sentinel). Sentinel found the card, and I clicked on the Clear User Data option in Sentinel.
When the process appeared to have completed, I removed the new card from the computer and back into the radio. Turned the radio on and surprise.... the SDS200 booted up correctly and brought up it's normal screen. Of course the message with "Nothing To Scan" appeared, as expected, since I had not written my files to the card. So I connected the cable to the radio from the laptop and "read" all the files (Main DB and Favs) from Sentinel on the computer to the SDS200 the card.
I was fortunate to have some extra new SD cards on hand. Apparently, they were already formatted correctly. But it was quite a scary experience. I've turned the radio on and off a few times to make sure everything is cycling correctly and updated the database.
The card that apparently went bad was the original card that came with the radio and to the best of my knowledge, had never been removed from the slot. Which is way I popped it in and out a few times, first hoping that the contacts were not "contacting".
So a tip for some who have not made those provisions---- always have an extra SD card on hand and ready to go.