Out of 16 gb others taking 8.64 gb memories. How to erase

Pmlyons24 wrote:

installing the update will not do anything

Yes it does a lot, please before you response do your research.

iOS 13.6.1 includes bug fixes for your iPhone => About iOS 13 Updates - Apple Support

• Addresses an issue where unneeded system data files might not be automatically deleted when available storage is low

Also did you actually read the link you have provided => Clear Other storage on your iPhone or iPad - Apple Support?

Here to make it simple for you, quote below:

Update your device

An issue in iOS or iPadOS 13 might prevent the system from freeing up storage for you. To fix this issue, update your iPhone or iPad to iOS or iPadOS 13.6.1.

Clear Other storage on your iPhone or iPad

If you have iOS or iPadOS 13, your iPhone or iPad storage is full, and the storage is mostly taken up by "Other" storage, update your device to the latest version of iOS or iPadOS.

https://support.apple.com/en-us/HT211686

If you have an iPhone 6s, install iOS 13.6.1 now.

installing the update will not do anything

its not going to resolve the issue

Yes it does but not for you.

Next time just reply to OP if you have some useful tips.