anyone know something about 3rd party bitcoin wallet which we can own private key?
Many people on this forum will suggest Blockchain.info, but I don’t trust wallets where I don’t control the software that signs my transactions. MITM attacks, malicious JS/browser attacks are possible.
Electrum is a great open-source lightweight client. It’s not a full node, but you can connect to a server that runs the client that you prefer (eg Core 0.15.1). You control the software and private keys, and it uses very little system resources or bandwidth.
if we want to install bitcoin hardware wallet into cpu or notebook.
how many space do we need? and how much volume data do we need to download?
I’m assuming you mean software wallets. Hardware wallets are external devices that can be plugged into PCs. As mentioned above, Electrum requires little space. I’m not at home to check the directory but it should be well under 100MB.
A full node like Bitcoin Core downloads the full blockchain in addition to storing other data. The blockchain alone is approaching 150GB as seen here:
https://blockchain.info/charts/blocks-size If you have limited bandwidth, you may need to change settings to listen=0 or blocksonly, or otherwise throttle bandwidth. If storage space is an issue, the node can be pruned as well.
But for a newbie, I suggest Electrum, for the sake of UI in the context of limited knowledge....