The Surface UEFI hard drive icon usually appears during startup when the device is checking the boot drive or when it can’t find Windows properly on the SSD. In many cases it means the system is trying to boot but something interrupted the normal process, like a corrupted boot file, a failed update, or the drive not being detected correctly. I’ve seen it happen after a forced shutdown as well, and usually a restart or checking the boot configuration in UEFI fixes it, but if it keeps appearing it may point to a Windows or SSD issue.