“Cloud” is a marketing term. Your question is about safety and control. If you want to back your work up to one or more remote servers, I see no problem with that. They are probably more secure against unauthorized access than your personal computer. Authorized access (gov) is also not an issue since this is photography. As for control, read the licence agreement of the storage service you choose to use, to make sure you don’t lose any rights over your work other than giving said service the minimum rights they need to store the data.
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