The cloud is the best way to go if you have a fast internet connection.
I have saved several files and pictures on my OneDrive (from Microsoft) and it never ever lost anything in the last ten years or more.
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I would strongly advise NOT to rely solely on 'the cloud' or in fact any alternate location which is not under your own full control.
There is nothing to prevent Microsoft or any other provider from withdrawing the service without warning....or shutting it down without notice....going bust....or, as is the current expertise evidenced by the latest Win 10 updates....simply deleting a User's files with the one apology...."Oops".
It is akin to making a careful backup on an SSD but then handing it to the first stranger you see in the street and saying 'look after this for me'.
You wouldn't....and likewise you shouldn't.
Best practice may see 'the cloud' as yet one more option...but NEVER a sole option. Ever.
What I do....
I have 6 physical hard drives totaling 8 partitions. 2 partitions are my M.2 drive, half is the OS and half is FSX [mostly].
Each day the OS part is imaged to a second physical drive. Each week the FSX part is imaged to a third physical drive, and each week the OS image is copied to a fourth.
Each day individual folders [work, fsx aircraft/paints, etc] are incrementally backed to a separate physical, and each week those backups are backed up to yet another drive.
That backup proggy [Syncback] is also used [when I remember....feel the urge] to backup those folders to a [normally] unconnected SSD that resides in a fire safe.
The phrase 'redundancy backup' is the best-case methodology for not ending up crying into your beer when everything goes missing/wrong.
Of course, there are paints of mine on SOH....which means they can be available 'in the cloud', but I've been a member of several sites who have suffered server crashes and lost their databases.... it happens...
