Doubles and mor on My cLoud Home

my cloud home has so many doubles in the photographs and many are repeated to the scale of 8 times. Total space for the doubles is 76GB. I have found an app which finds doubles and it is taking two days to delete them which thankfully this app does automatically when set. During the period I have had My Cloud we have changed phones and kept photos on them, and this is probably a big part of the reason for the problem, as the photos are automatically uploaded.
Does anyone know how to stop doubles appearing.

Hi @Ghoster1,

Please refer to the article my Cloud Home: Duplicate Pictures and Content: