That is asking to format, it is seeing the physical drive, just not the logical drive with a drive letter assigned to it. That said, the internal memory would appear to be corrupted. Before I'd try DJI or any recovery tools, I'd try a few things. One, with the drone on and attached via USB, I'd reboot the Windows machine and see if it can mount it during the boot process. If that doesn't work, I'd try a different USB port and reboot again. If this persists, you may attach it to a Mac if you know someone with one. If it fails to mount during reboot, then I'd download this free tool.https://accessdata.com/product-download/ftk-imager-version-4-7-1 You'll have to give them your email address, but it's a free tool worth having. Open the tool and go to File > Add Evidence Item and choose physical drive. I can't tell you which drive number is will be, but you'll be able to identify it by its size, which I believe is 8 GB. Once it mounts, you can drill down under partition, and then FAT32 or exfat, likely the latter, and then root. Under root, you should see your folder and files. You can right click on any folder or file and copy them out to your local computer. Once you recover your data, you can format the drive. Personally, I let the drone do the formatting as it knows best what it wants.