How can I back up my bookmarks and access them online?

Jenifer wants a backup while EC wants a replacement for Google+, which is shutting down

I have a lot of bookmarked sites for medieval manuscripts on my laptop, which it took a long time to collect. How can I back them up in case the laptop dies? Jenifer

As you know, Google is closing Google+ in April. I currently use the site as my online bookmarking tool. Can you suggest something that is easy to use both online and on mobile? EC

First things first, Jenifer. You should have a backup of your whole hard drive in case your laptop dies. Your operating system almost certainly includes usable backup software. Otherwise, there are more than 30 free third-party alternatives for Windows including BackUp Maker, AOMEI Backupper Standard and EaseUS Todo Backup Free.