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It's usually possible to tidy up an existing installation by deleting a few files in a few places, rather than deleting everything and putting most of it back. like, hours.Īlso: the benefits of a 'fresh' OS install are over-rated. It's likely that if you boot to Recovery, or an installer disk, then you could erase the internal drive without sync-ing that erasure to the cloud, because you're not logged in.īut, you should never perform any operation where there is a risk of losing your files (and by 'perform any operation', I mean 'use your computer') without one or more copies of your data on one or more separate physical devices.Īlso: restoring large amounts of data from the cloud will be SLOW. If you delete a file, iCD deletes that file, too. ICloud Drive synchronises whatever is on your computer. ICloud Drive does not make copies of your applications system settings user settings or anything else like Fonts, audio and video files (not bought from Apple), etc, etc. Files without a backup are waiting to be lost.

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