To determine whether preloader_k62v1_64_bsp.bin is the correct file for your device, examine the device information from:
: Flashing a new stock ROM via the SP Flash Tool requires this file to ensure the PC can communicate with the device's storage partitions. Preloader-k62v1-64-bsp.bin
If you are updating a working device or flashing a custom ROM package and are uncertain about the firmware's exact origin, uncheck the preloader partition in your flashing tool. This leaves your current, working preloader intact while updating the rest of the Android system partitions. How to Recover from a Failed Preloader Flash To determine whether preloader_k62v1_64_bsp