Is it OK to delete old Backups on iCloud?

A: The short answer is no—deleting your old iPhone backup from iCloud is completely safe and won’t affect any of the data on your actual iPhone. In fact, even deleting the backup of your current iPhone won’t have any impact on what’s actually on your device.

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Is it OK to delete old iPhone Backups?

Yes, it’s safe but you will be deleting data in those backups. Should you wish to restore your device from a backup, then you wouldn’t be able to if it’s deleted. And yes, data does get deleted. I barely have any storage on my phone left and I saw that backups take a lot of space.