It's ok to send it to an Exchange, well I'm my case it is Volabit ( not sure if it's considered an exchange). I just let the BTC accumulate there until I get like a 0.5 or 1 BTC and then I transfer them to the hardware wallet (if I don't sell them right there and then). I think it is completely fine just don't keep too much BTC there, I personally don't let it go over 1 BTC. For me Volabit works the best, I like the page layout, notifications and they charge me barely anything for pulling my BTC out. I've never had a problem with any of the transfers from them, and it Has been always very quick for me!

I'm a little confused, why don't you just have the mining rewards go straight to your hardware wallet?
-Tamerz
Few reasons:
1. I like to keep track of all my BTC and Ether on my Ipad and I hate having to use laptop when using Ledger. 2. I like to get notified every time I get a reward so that I know when and for what Block I got payed.
3. I don't make nearly enough BTC to make me use the Ledger and when I get my rewards I sell them on Volabit and Coinbase at the end of the month to be able pay for some bills like electricity and CC debt that I'm sure most of us have.
4. The Ledger support told me not to send mining rewards directly to the hardware wallet.
But If I was a partner of BlockMines, I'm sure I would be using a hard wallet and not one! Lol


