Oh my... :shock:Paul.Cambs said:There's lots on here about this, but inshort you're out of luck
Each overall.nds is matched to the SD card it came with (we believe the file contains the serial number of the SD card hidden somewhere), so noone else's overall.nds will work on your SD card - you'll need a replacement SEAT SD card (which will have it's own overall.nds) either new of secondhand and upgrade
nCognitos said:All SD cards have a CID or Card Identification Register, which includes a MID or Manufacturer ID, this is what is needed for a card to work with the SEAT navigation system. Any VAG group SD card should work, some Skoda branded ones are now 32Gb. Generic non-VAG ones will not work, this code is 'burnt' into the card and cannot be changed.
If you lose you overall.nds file, you need to find one that is v4 or earlier, then save that file and reuse it when upgrading to newer navi versions.
Navi versions beginning with 6P are 'AS' versions or MIB 2 and are different from Navi versions beginning with 5F, which are MIB 1. If you have a 6P or 'AS' system, you should stick with the same when upgrading.