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Optimisation was 100% now 90%?

I can't offer any reason why it's 90%, but my personal advice would be not to bother with optimisation at all.

It's virtually pointless. It's essentially a task killer and those have been unnecessary and counter productive on Android since Android 2.1.

If you notice a little note at the bottom of the optimisation screen you'll see it's powered by Clean Master (aka Cheetah Mobile) who are one of the scummiest developers on the Play Store.
 
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The optimisation feature that I am referring to is the Device Maintenance that came installed on the S8 from new, not an app that I have installed.

Yep, the built in optimisation feature is provided by Clean Master. It's honestly worthless.

My phone was running at 62%, I ran it for the first time ever and now it's at 90% with no perceivable difference in the performance of my phone. All that's changed is the number on the screen. It also told me it have cleaned up 1.6GB of space from storage. Neither the amount of free space in my phone storage or SD Card has increased.

In answer to your original question though, it looks as though it will remain at 90% unless you've activated the inbuilt malware/AV protection. Again, AV is sorta pointless on Android unless you're careful with what you install.
 
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El Presidente

Comments noted and taken in and now remember the same from aeons ago in respect of task killers.
Oddly enough I also have the Galaxy Tab 3 that also showed 100% and then dropped to 90%.

Quote:-
"AV is sorta pointless on Android unless you're careful with what you install."

Should that be "AV is sorta pointless on Android unless you're not careful with what you install."?
 
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