Back up day! Back up your digital items in the cloud as well as using another method such as an external hard drive and/or a flash drive (or all three!). It's important to keep our genealogy info safe for today and tomorrow.
Also, consider periodically downloading a gedcom (family tree document in standardized format) from Ancestry and MyHeritage so you can keep those trees in your digital possession too, just in case. I have trees on both of these sites so I download a gedcom from each from time to time. Here's how I do it.
Ancestry download
At top of this blog post is a picture of the "tree settings" section of my Wood family tree, showing "tree info" that includes tree name and description on the left.
The button for downloading a gedcom is at lower right of this page (see blue arrow in image). I clicked the button "download your GEDCOM file" and very quickly the file appeared on my desktop (in your case, wherever downloads are supposed to go, since your destination may be different).
The download will have a .ged file extension at end of the file name. I renamed the file to reflect the Wood tree but left the .ged extension.
Wash, rinse, repeat for all trees. I have a few trees on Ancestry, including a speculative private tree, and want to download each as an occasional backup.
MyHeritage export
On MyHeritage, I go to the dropdown "family tree" menu at top of page, select "manage family trees," and then see options like "download original GEDCOM" and "export to GEDCOM." This is the image above.Since I originally began with a gedcom upload from my software, I don't want to download the original now. I do want to export the current family tree to a gedcom now!
Once I request the export, MyHeritage asks whether I want personal photos and photo album in the download. Yes, I do! See image at right where I checked those boxes for my export.
MyHeritage sends me an email when the export is ready, with a link to click to retrieve the gedcom. I change the name to describe which tree, but leave the .ged ending. Wash, rinse, repeat for each tree if more than one.
WikiTree download
Yes, it is possible to download a gedcom from WikiTree. You can read about the process (and any privacy concerns) here.
Backing up isn't complicated, and it gives me peace of mind.