This is the way I currently make sure my data is secure.
I am recording it here, partly as it may be of some interest to others, and partly so I can remember how I do it.  I have changed systems over the years and I have found that documenting processes is really important.  Documenting it on line means that this document is backed up on two of my computers, Dropbox, and the website servers. It should be pretty safe.

I was a professional photographer before I retired and keeping backups reliably was crucial.  I won't go in to the nitty gritty but it involved big disk drives and memory sticks.

But nowadays, although I still want to be as careful, I have far less data to back up. So here is what I do.

Websites are backed up on the servers as soon as they are published but sometimes pages are not published for quite a while.  So my websites are stored in a Dropbox folder on my goto laptop (a Lenovo thinkpad running windows 7).   I have another laptop, (A samsung RV511 running windows 7) which also has a Dropbox folder so these files are automatically synced.

The Dropbox folder also holds current and recent spreadsheets, downloaded manuals, music lyrics, and electronic designs.

All of my Dropbox stuff amounts to only 176MB, well within the free Dropbox 2GB limit. This means that this data is stored in THREE places, and even if both PCs are lost or stolen it is still available on the web.

Stuff not used often is stored in a Folder called DATA_1_master on the Lenovo.
This is kept in sync with a transfer memory stick in folder called DATA_1_transfer using IceMirror
This is in turn kept in sync with a folder on the Samsung called DATA_1_backup.

Photos and Videos are another matter. I have 25GB, far too much for Dropbox or Google drive. (When I was working as a professional photographer I had well over 2TB of photos.) These are loaded up to the Samsung from my phone using wifi transfer pro, or from cameras by plugging in the memory cards.
These are in subfolders in a folder called DATA_2.  The master copy of this folder is maintained on the Samsung and kept in sync (using ICE Mirror) with a USB memory stick. The memory stick in turn is kept in sync with the Lenovo.

This means that this information is also stored in THREE places.  As long as the memory stick is kept separately it is almost as secure as the Dropbox data.
But I don't always make the backups every time a change something. So I could lose data. But only that not saved since the last backup.

This method is good enough, cheap, and quite fast.

Photo indexing
Windows photo gallery is good but unsupported.(since 2017)  It has been replaced by Windows photos which only works in windows 10.  Windows photos does not recognize windows photo gallery tags.

Faststone is not good with tags

Adobe bridge is free and seems to do the job well.  Xplorer 2 recognizes bridge tags.

When photo's are tagged, the file size changes so that the backup program, IceMirror recognizes it as a change and will update the file.

SO the procedure is to upload the files onto the Samsung, index them with Bridge, then backup to the memory stick with IceMirror, then back up from the stick to the Lenovo with IceMirror.

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Other sites by Ye olde Webbesmith are Twenty Forty Five and Tin Taxi.