Which tool, program or app should be used to store personal data these days?

Tw
2

I plan to save data from people I plan to work with in the future or offer services in the present for which they may be willing to pay money and on which tool, program or app it makes most sense today to have personal data such as name, To have first name, address, telephone number and other stored in order to reach these customers later as easily as possible, for example with the PC, notebook or smartphone by phone, email or to sell this data on (to other people who are ready for something Paying money to also offer you any products or services)? Who knows?

au

Could it be that you mean something in which you can store a lot of data, like money in a bank?

A database comes to mind.

MySQL, MongoDB, SQLite, MariaDB - just to mention the most popular systems.

It's your choice!

When it comes to the reason for the purpose and the rest, as a CISO I look away ^^

Tw

Could it be that you mean something in which you can store a lot of data, like money in a bank? Yes, something like that, I'm looking for things that banks probably use themselves (such as a digital data sheet about me) so that I can sometimes use my mobile phone to inform or offer something that could be useful.