How to test Nano Legder words before sending many coins?

[USBitcoinServices.Com]

Hi, I want to test my 24 words before sending a big amount of coins to my Nano ledger S device, could you tell me how to do this?

I have a few altcoins already in my wallet (custom token from MEW) and want to test entering one word by one from my 24 passphrase words, just to make sure they all were well spelled.

I was able to do that with Trezor, but apparently, this Nano ledger doesn't have that option? the only option I can see if formatting all and get new 24 words, which is not what I am looking for.

One option I know is doing it on a new computer, but want to try on the same computer where the apps are already installed.

[HCP]

Seems like you're wanting to test the "recovery" process of a Ledger Nano S... To put it into restore mode, just click the button marked "X" (the button on the left) when it asks if you want to configure as a new device (after a wipe/format):



Full instructions here: https://ledger.groovehq.com/knowledge_base/topics/how-to-import-slash-recover-a-backup-on-a-nano-s

[USBitcoinServices.Com]

Seems like you're wanting to test the "recovery" process of a Ledger Nano S... To put it into restore mode, just click the button marked "X" (the button on the left) when it asks if you want to configure as a new device (after a wipe/format):



Full instructions here: https://ledger.groovehq.com/knowledge_base/topics/how-to-import-slash-recover-a-backup-on-a-nano-s

Thank you!
Trying that, and the missing video is here: https://www.youtube.com/watch?v=DQ2JvbawnZ0
To reset first!

[Betfair]

Seems like you're wanting to test the "recovery" process of a Ledger Nano S... To put it into restore mode, just click the button marked "X" (the button on the left) when it asks if you want to configure as a new device (after a wipe/format):



Full instructions here: https://ledger.groovehq.com/knowledge_base/topics/how-to-import-slash-recover-a-backup-on-a-nano-s

Thank you!
Trying that, and the missing video is here: https://www.youtube.com/watch?v=DQ2JvbawnZ0
To reset first!

to reset just enter wrong pin code 3 times easy peasy

[AmXProX]

This device is used to store your BTC right but just a question what will happen if I lost it? will I still be able to recover my coins? How is it being updated to the block chain?

Planning to buy one but I really have a lot of questions about it. 

[HCP]

This device is used to store your BTC right but just a question what will happen if I lost it? will I still be able to recover my coins? How is it being updated to the block chain?

If you lost it... you use your 24 word seed mnemonic to restore another replacement HW wallet, or into a wallet that supports BIP39 seeds, like Electrum, or you use a tool like the BIP39 Mnemonic Code Converter (https://iancoleman.github.io/bip39/) to generate all the addresses/private keys that belong to your 24 word seed mnemonic and you import/sweep the required private keys into the wallet of your choosing.

The wallet itself is not "updated to the block chain". It is simply a keystore for you private keys. The actual transaction type information is generally held in a software wallet on your PC/Phone in what is effectively a "watching only" wallet (ie. it has no private keys stored in it). You then use the software wallet in conjuction with your hardware wallet to sign transactions/messages when required (ie. software wallet sends unsigned transaction to hardware wallet, you confirm all the details and click "ok", hardware wallet signs the transaction and sends it back to software wallet for broadcast etc)

Planning to buy one but I really have a lot of questions about it. 

Then I suggest you head over to either Trezor.io or legderwallet.com and start reading their FAQs etc:
http://doc.satoshilabs.com/trezor-faq/index.html
https://ledger.zendesk.com/hc/en-us/categories/115000820045-GENERAL-OVERVIEW

Both of those sites have pretty comprehensive documentation explaining all about hardware wallets and how they work.