# Hardware devices

Hardware device guides and Troubleshooting

## General information

- [What is a seed phrase?](https://support.casa.io/knowledge/what-is-a-seed-phrase)
- [(Advanced) Using Casa with a Mostly Seedless Setup](https://support.casa.io/knowledge/seedless-multisig)
- [Hardware devices and keyset diversity](https://support.casa.io/knowledge/hardware-devices-and-keyset-diversity)
- [Which hardware device should I use with Casa?](https://support.casa.io/knowledge/which-hardware-device-should-i-use-with-casa)
- [Where to purchase your hardware device](https://support.casa.io/knowledge/where-to-purchase-your-hardware-device)
- [Dongles and connector cables for your hardware device](https://support.casa.io/knowledge/dongles-and-connector-cables-for-your-hardware-device)
- [How to update your hardware device firmware safely](https://support.casa.io/knowledge/hardware-device-firmware-upgrades)
- [Hardware device life cycle and degradation](https://support.casa.io/knowledge/hardware-device-life-cycle-and-degradation)
- [How to safely obtain and store your seed phrases](https://support.casa.io/knowledge/how-to-safely-obtain-and-store-your-seed-phrases)
- [Restoring a hardware device using the backup seed phrase](https://support.casa.io/knowledge/restoring-a-hardware-device-using-the-backup-seed-phrase)
- [How to sign with a hardware device without email access](https://support.casa.io/knowledge/how-to-sign-with-a-hardware-device-without-email-access)
- [QR code signing in Casa vaults](https://support.casa.io/knowledge/qr-code-signing-in-casa-vaults)
- [What does airgapped mean?](https://support.casa.io/knowledge/what-does-airgapped-mean)
- [What is a health check and how does it work?](https://support.casa.io/knowledge/health-checks-in-the-casa-app)
- [Hardware device funds are not showing in the Casa app](https://support.casa.io/knowledge/hardware-device-funds-are-not-showing-in-the-casa-app)
- [Troubleshooting hardware device issues — where to start](https://support.casa.io/knowledge/general-hardware-device-troubleshooting)

## Trezor

- [Where to purchase a Trezor device](https://support.casa.io/knowledge/where-to-purchase-a-trezor-device)
- [How to set up Trezor One for your Casa vault](https://support.casa.io/knowledge/setting-up-trezor-one-for-use-with-casa-1)
- [Setting up Trezor Model T for use with Casa](https://support.casa.io/knowledge/setting-up-trezor-model-t-for-use-with-casa)
- [How to set up Trezor Safe 3 for your Casa vault](https://support.casa.io/knowledge/setup-trezor-safe-3)
- [Adding Trezor to your Casa vault](https://support.casa.io/knowledge/adding-trezor-to-your-casa-vault-1)
- [Performing a health check with Trezor](https://support.casa.io/knowledge/performing-a-health-check-with-trezor)
- [Signing a transaction with Trezor](https://support.casa.io/knowledge/signing-a-transaction-with-trezor)
- [How to send from Trezor to Casa](https://support.casa.io/knowledge/how-to-send-from-trezor-to-casa-1)
- [Trezor Suite](https://support.casa.io/knowledge/trezor-suite-and-trezor-bridge)
- [Trezor troubleshooting](https://support.casa.io/knowledge/trezor-troubleshooting)

## Ledger

- [How to Migrate Your Ledger Key to a Hardened Derivation Path](https://support.casa.io/knowledge/how-to-migrate-your-ledger-key-to-a-hardened-derivation-path)
- [Where to purchase a Ledger device](https://support.casa.io/knowledge/where-to-purchase-a-ledger-device)
- [Setting up Ledger Nano S + for use with Casa](https://support.casa.io/knowledge/setting-up-ledger-for-use-with-casa-1)
- [Ledger Bitcoin App and firmware guide](https://support.casa.io/knowledge/ledger-bitcoin-app-and-firmware-guide)
- [Can I use Bluetooth with Ledger Nano X?](https://support.casa.io/knowledge/can-i-use-bluetooth-with-ledger-nano-x)
- [Adding Ledger to your Casa vault](https://support.casa.io/knowledge/adding-ledger-to-your-casa-vault-1)
- [Performing a health check with Ledger](https://support.casa.io/knowledge/performing-a-health-check-with-ledger)
- [Ledger wallet registration](https://support.casa.io/knowledge/ledger-wallet-registration)
- [Signing a transaction with Ledger](https://support.casa.io/knowledge/signing-a-transaction-with-ledger-1)
- [How to send from Ledger to Casa](https://support.casa.io/knowledge/how-to-send-from-ledger-to-casa)
- [How to use the BTC recovery app on Ledger](https://support.casa.io/knowledge/how-to-use-the-btc-recovery-app)
- [Ledger and Hardened Derivation Paths: what changed and what It means for your vault](https://support.casa.io/knowledge/ledger-and-hardened-derivation-paths-whats-changing-and-what-it-means-for-your-vault)
- [Ledger troubleshooting](https://support.casa.io/knowledge/ledger-troubleshooting-1)

## YubiKey

- [How to migrate a hardware key to a Yubikey](https://support.casa.io/knowledge/how-to-migrate-a-hardware-key-to-a-yubikey)
- [How to check your YubiKey firmware version](https://support.casa.io/knowledge/yubikey-firmware-version)
- [Setting up YubiKey for use with Casa](https://support.casa.io/knowledge/setting-up-yubikey-for-use-with-casa)
- [Adding YubiKey to your Casa vault](https://support.casa.io/knowledge/adding-yubikey-to-your-casa-vault)
- [How to perform a health check with YubiKey](https://support.casa.io/knowledge/performing-a-health-check-with-yubikey)
- [Signing a transaction with YubiKey](https://support.casa.io/knowledge/signing-a-transaction-with-yubikey)
- [How to duplicate Your YubiKey](https://support.casa.io/knowledge/how-to-duplicate-your-yubikey)
- [YubiKey troubleshooting](https://support.casa.io/knowledge/yubikey-troubleshooting)

## Coldcard

- [Where to purchase a Coldcard device](https://support.casa.io/knowledge/where-to-purchase-a-coldcard-device)
- [Setting up Coldcard for use with Casa](https://support.casa.io/knowledge/setting-up-coldcard-for-use-with-casa-1)
- [How to check the Coldcard Ypub](https://support.casa.io/knowledge/how-to-check-the-coldcard-ypub)
- [Adding Coldcard to your Casa vault](https://support.casa.io/knowledge/adding-coldcard-to-your-casa-vault-1)
- [How to perform a health check with Coldcard](https://support.casa.io/knowledge/performing-a-health-check-with-coldcard)
- [Signing a transaction with Coldcard](https://support.casa.io/knowledge/signing-a-transaction-with-coldcard-1)
- [Coldcard troubleshooting](https://support.casa.io/knowledge/coldcard-troubleshooting)

## Passport by Foundation

- [Where to purchase a Passport device](https://support.casa.io/knowledge/where-to-purchase-a-passport-device)
- [How to set up Passport (Founders Edition) for your Casa vault](https://support.casa.io/knowledge/setting-up-passport-for-use-with-casa)
- [How to set up Passport Batch 2 for your Casa vault](https://support.casa.io/knowledge/setting-up-passport-batch-2-for-use-with-casa)
- [Adding Passport to your Casa vault](https://support.casa.io/knowledge/adding-passport-to-your-casa-vault)
- [Performing a health check with Passport](https://support.casa.io/knowledge/performing-a-health-check-with-passport)
- [Signing a transaction with Passport](https://support.casa.io/knowledge/signing-a-transaction-with-passport-1)

## Keystone

- [Where to purchase a Keystone device](https://support.casa.io/knowledge/where-to-purchase-a-keystone-device)
- [Setting up Keystone for use with Casa](https://support.casa.io/knowledge/setting-up-keystone-for-use-with-casa)
- [Adding Keystone to your Casa vault](https://support.casa.io/knowledge/adding-keystone-to-your-casa-vault)
- [How to perform a health check with Keystone](https://support.casa.io/knowledge/performing-a-health-check-with-keystone)
- [Signing a transaction with Keystone](https://support.casa.io/knowledge/signing-a-transaction-with-keystone-1)