Uploading data and uploading to an online store, website. How did you set it up?

Question

Data synchronization

Share your experience, how do you upload / download data from a working computer to a website / online store?
Or how would you like to do it?
Interested primarily in large amounts of information and regular use.
But it will also be interesting to hear about small volumes.
If you use technology bypassing a working windows computer, then it will also be interesting to hear.
Any opinions are important to me, thanks!