> Are those upwards compatible e.g. from MK2 to MK4? 

For the sake of completeness: You can not restore a backup written with an older Coldcard/firmware on a newer device.

Years ago I rotated out a Nano S before the support by the current software was discontinued. At that time I migrated the address format and therefore did it onchain.

Coldcard allows to create backup files to the SD card. Are those upwards compatible e.g. from MK2 to MK4? I guess using such a backup saves some time.

Does anyone have experience with that or can confirm that this works as expected.

bitcoin

Hardware Wallet Replacement

Years ago I rotated out a Nano S before the support by the current software was discontinued. At that time I migrated the address format and therefore did it onchain.

Coldcard allows to create backup files to the SD card. Are those upwards compatible e.g. from MK2 to MK4? I guess using such a backup saves some time. 

Does anyone have experience with that or can confirm that this works as expected.