Part 6/10:
Digital vs. Physical Backup
Avoid storing seed phrases digitally (cloud, images, USB), as this leaves them vulnerable to theft or malware.
Always favor physical, offline backup solutions.
Using Cold Card Q with Mobile & Desktop Wallets
Mobile: Nunchuk Wallet
Install Nunchuk Wallet and connect via QR codes.
Import your Cold Card key as an airgap key. Use the device to export JSON data via QR code, then scan with Nunchuk.
Create a Bitcoin wallet in Nunchuk linked to the Cold Card key.
To receive funds, generate and share the QR address.
To spend, create a PSBT transaction in Nunchuk, export an unsigned QR, and sign it on the Cold Card Q.