How to create your own server ? (Where only you can access the data stored in it). Is that even possible ?

Answer 1

You can host a remote server with your own ip address. Where the person who knows the IP can access it. It's better you don't share with any.
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Answer 2

A server is just a computer. So get a second computer (no GPU, CPU doesn't really matter if only you will access it - you can use any old computer for this), install Linux or some BSD on it, hook up as many HDDs as you need, install all the server software you want (Apache for http, vsftpd for ftd, openssh for ssh and so on), set them up, and you're good to go. Just connect using the local IP.

If you want to access the server from outside your house, set up your router so it redirects incoming access requests at the particular port you want (80 for http, for example) to the server computer. Note that this *will* leave you open to attackers.

Answer 3

How can you share wifi bundles from the main or server computer to am android device or anothe pc