If you do not take a backup copy of the photos of your grandchild, one day they will be lost forever. If you are not certain that you are taking backup copies and know how to recover when a disaster happens, please let me help.
Disaster does not only happen to other people. It is essential to do a test recovery every few months to ensure that things are working as you believe and so that you will remember how to recover when the dreadful day arrives. Within the last two weeks I have had to deliver bad news to two clients who mistakenly thought they were protected by backup. One lost all business related files as a result of hardware failure and was asked for about £1500 for recovery of 20% by a professional company, the other inadvertently caused the problem and lost decades of photos and music.
Windows 10 and Apple's OSX come with excellent backup software, all you need do is provide a local network disk (best for multiple computers), an external drive (the cheapest compromise storage), or use the cloud. Then test recovery regularly.