iPhone storage saying less than true value

Hello ~ I would suggest you contact Apple at this point and if I were you I would not wait around for another update that may not even help you . Go to upper right hand corner and click on Get Support or:

Contact Apple for support and service

~Katana-San~

Hello ~ Try this and see if it helps:

Force restart iPhone - Apple Support

~Katana-San~

Hello ~ Still working on this …try signing out of your Apple ID and back in …then check . Before doing so make sure you know your info to sign back in …so we don’t add to your problems :)

~Katana-San~

Hello ~ I see that this is a reported bug…but I however am not experiencing the problem so it must be a setting or some other problem as I am sitting on iOS 15 right now on my iPhone and have not and probably will not update my iPad for awhile…trying signing out and back in. By the way another good resource for learning here are the user tips written by other members…it helps me.

~Katana-San~

I'm having that exact same issue on my iPhone 12 and it's annoying because I actually don't know how much storage I have because the phone's calculation reflects what it says on iTunes. I'm on the verge of factory resetting it and everything but i don't know if theres another fix.

Hello ~ Try the forced restart not factory reset.

Force restart iPhone - Apple Support

~Katana-San~

I have the same issue and forced reset doesn’t work

Yeah me too:bright side is that at least we all know we’re not alone

I have the same with 0kb used of 128 GB and under About it shows my capacity is 128GB with 134.35 GB available

I have tried force restart and no change

Seeing that it worked for a while for you, I wouldn’t want to reset my phone. Probably wait for iOS 15.0.2 to hopefully see a fix.

Latest update fixed this. All is good now