docs(ledger): manual installation for deprecated devices (#4506)

* docs(ledger): manual installation for deprecated devices

* Update docs/content/about-iota/iota-wallet/how-to/integrate-ledger.mdx

Co-authored-by: Lucas Tortora <85233773+lucas-tortora@users.noreply.github.com>

* for deprecated devices such as Ledger Nano S mention

* Update docs/content/about-iota/iota-wallet/how-to/integrate-ledger.mdx

Co-authored-by: Lucas Tortora <85233773+lucas-tortora@users.noreply.github.com>

---------

Co-authored-by: Lucas Tortora <85233773+lucas-tortora@users.noreply.github.com>

docs/content/about-iota/iota-wallet/how-to/integrate-ledger.mdx

@@ -17,7 +17,10 @@ Before connecting your Ledger device to IOTA Wallet, ensure the following:
 
 ## Install the IOTA Rebased App on Your Ledger Device
 
-To use IOTA Wallet with Ledger, install the IOTA Rebased app on your device through Ledger Live.
+To use IOTA Wallet with Ledger, install the IOTA Rebased app on your device through Ledger Live or manually.
+Ledger Live is preferred, but you need to install the app manually for deprecated devices like the Ledger Nano S.
+
+### Ledger Live (preferred)
 
 1. Unlock your Ledger device.
 2. Open Ledger Live and navigate to **My Ledger** in the left panel.
@@ -26,6 +29,25 @@ To use IOTA Wallet with Ledger, install the IOTA Rebased app on your device thro
 5. Click **Install** to download the IOTA Rebased app to your device.
 6. Your device will show the installation progress.
 
+### Manually (for deprecated devices such as Ledger Nano S)
+
+:::warning
+
+Make sure you have enough space left for an additional app on your device.
+
+:::
+
+1. Go to the latest release on https://github.com/iotaledger/ledger-app-iota/releases.
+2. Download the archive matching your device, e.g. `nanos.tar.gz` for the Ledger Nano S.
+3. Verify that the checksum (`shasum -a 256 nanos.tar.gz`) matches the one from the release.
+4. Extract the archive `tar -xvzf nanos.tar.gz`.
+5. Move to the app folder `cd nanos`.
+6. Follow the steps on https://github.com/LedgerHQ/ledgerctl to install `ledgerctl`.
+7. Install the app on your device `ledgerctl install -f app_nanos.json`.
+8. Accept `Allow unsafe manager` on your device.
+9. Accept `Perform installation` on your device.
+10. Enter your pin on your device.
+
 ## Import Accounts from Your Ledger Device
 
 To import accounts from your Ledger into IOTA Wallet: