I have written several times about the wisdom of keeping backup copies of your more valuable files. You can keep local copies or off-site copies but the important thing is to always have copies available someplace. One popular option is to keep copies in “the cloud,” using one of the file storage services, such as Dropbox or Google Drive or OneDrive.
Actually, there are dozens of available cloud-based file storage servies to choose from but Dropbox, Google Drive, and Microsoft OneDrive seem to be the three most popular, if not necessarily the best. Joel Lee has published a side-by-side comparison of the “big three,” pointing out the strengths and weaknesses of each. If you are thinking of using a file storage service, you might want to read the article on the Make Use Of web site at: http://bit.ly/2mRQmyW.