If you cannot obtain V6 or want newer features:
Crucial Warning: Do not download "free" V6 files from BitTorrent or unofficial forums. These can contain malware, corrupt your SD card, or, worst of all, brick your navigation unit. Nissan uses digital signatures; a cracked file will cause a "Check SD Card" error. Nissan Connect 2 Europe V6 Download
A: Eject and re-insert the card. If persists, perform a hard reset of the head unit (press and hold volume knob for 10 seconds). If still failing, the SD card may be corrupted—return to dealer. If you cannot obtain V6 or want newer features: