So just to be sure, you mean that :
it won't cost me more than the usual fee but as there are 2 inputs, it will slow a little more the whole network and then globally raise the average fee of the network ??
And so my next question is :
- As both address A and B are required to send my 0.015BTC (0.01 BTC from A and 0.005 BTC from B, where is the advantage in terms of privacy for the Ledger Nano S to propose different addresses every time we end BTC to it ??
Thank you so much !
Listen, Ledger nano and other hardware wallets uses technology called HD wallet. What this does is it can generate enormous private and public key pairs. It gives you privacy in a sense that every new transaction is not linked until you send. So You may have 100 inputs but when you send your coins you use only few of them like 5 or so. Some people can link which addresses you own of course, specially if they develop advanced algorithm just for this, this is due to bitcoin transactions being public. If you are concerned about your privacy you could start to look for coins that are privacy related such as monero for instance which use ring signatures in order to hide sender/recipient by doing this many people could be potentially senders and receivers which makes it very hard if not even impossible to track specially if you move your coin frequently.
You would need to use those 2 outputs anyway, since you would have 2 received transactions even if you used 1 address which means that this doesn't change much in terms of fees tbh.