Hi guys,
I do HODL my BTC in cold storage while I'd like to transfer them on my brand new hardware wallet.
I was thinking to swipe the keys with MyCelium.
You can't swipe the keys from your cold wallet to any hardware wallet even if the latter is connected to app like MYCELIUM and such. The bounded set of keys in hardware wallet is determined by 256-bit random seed and there is no way to add there anything else.