You can maintain 3 types of family trees that you can have on your Family Site:
1. An Online Tree:
This tree is started directly on your family site. It can be edited and viewed online, in your Family Site. You can choose to let your Site Members edit the tree as well. The information in this tree can be backed up on your computer by exporting a GEDCOM file in the Family Tree > Manage Trees page.
2. A GEDCOM Tree:
This is basically an online tree, which was not started from scratch. It was either imported from Family Tree Builder, or another genealogy software or website. You can import any standard GEDCOM file to your Family Site, in the Family Tree > Import GEDCOM page. Once imported to the site, it can be edited as an online tree. You can download the original GEDCOM that you uploaded at any time, by using the Download option in the Family Tree > Manage Trees page.
3. A Family Tree Builder tree:
This tree is built using our Software – Family Tree Builder (FTB). FTB needs to be installed on your computer (http://www.myheritage.com/family-tree-builder) and you can start building the tree.
In previous versions of Family Tree Builder software, only the site manager could publish a tree to the website. After publishing a tree from Family Tree Builder to the family site, all changes made on the software were shown on the website. The tree on the site was ‘read only’ and only the site manager could edit the tree details, using the software.
Now with Family Tree Builder 7.0, the sync option allows you to edit your tree from both the software and from the online family site (as well as through the mobile app!). Wherever you edit your tree, it will be synced with your website and Family Tree Builder software.
You can choose to edit the tree online by yourself, or with your site managers, and site members. By default, trees that were synced from Family Tree Builder to a family site can be edited online by the original site creator only, and it will remain read-only for other site members. If you would like to have a family tree that all of your site managers, or that all of your site members can edit online, please see the following article: Can my Family Tree Builder tree be edited online?
If your computer is damaged, you can always recover the tree from the published version on your Family Site, with the photos.