IPhone 6S storage full

Did it ask for your Apple ID and go back to the Hello screen?

If not then try a DFU

https://support.apple.com/en-gb/HT201263

If it did go to Hello screen and you set it up manually from scratch and it is still all "Other" there is something wrong with your phone. You can reach out to Apple Support directly. Depending on your region, you may be able to reach them here: contact Apple Support 

or 

click on

 your device probably needs service.

But do the DFU first .

NadiaM12 Said:

"IPhone 6S storage full: i reset my iPhone because it was showing most storage was taken up by “others”. I reset my phone but others is still occupying 15.8 GB of the 16 GB. This is without me restoring my backup after the reset."

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Troubleshooting iPhone Storage:

Internal storage cannot be upgraded. It is what it is. So, the maximum internal storage capacity never increases, even if you upgraded your iCloud plan. Learn More here: What's the Difference Between Device Storage and iCloud Storage? Apple Support

Clearing "Other":

Clear the storage named "Other". It basically contains unnecessary files such as caches that are used for system ease of use - all of which gather over time: How to Clear "Other" in your iPhone's Storage - Use Backup - User Tips. Caches would be being used for remembrance of application use. So, clearing other may be the way to go about this, as it would be performs through use of a computer.

NadiaM12 Said:

"most storage was taken up by 'others'."

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Please Define: "others":

Ending in "s" are you referring to the storage named "Other". Or do you mean other items.

If not "Other" sorage, then clear the following...

A. Clear Temporary Internet Files:

Clear your Temporary Internet Files(Cookies & Cache) of Safari:

• Cookies perform remembrance of certain site-entered data.
• Cache keeps a snapshot of the last time you visited a site.
• Go Here: Clear the History and Cookies from Safari on your iPhone, iPad, or iPod Touch - Apple Support

Also...



B. Clean TV and Music Libraries:

Remove all unneeded files from your TV and Music Libraries. Full-Movies take up 2-4GB typically, and a bunch of those would take up a load of storage, ideally. So, if you have any movies that are not needed, then delete them.

After a proper reset to factory there should only be 7GB of iOS and almost no Other.

I don't think the reset worked hence my recommendation to DFU it in Recovery Mode.

If this iphone 6S has only 16GB it must be a very early one and there will not be much room for big apps or media.

Reset by "Erase all content and settings" should have worked but for some reason, as I said, it did not work and presumably did not go to the Hello screen.

Under those circumstances doing a restore via computer or doing the DFU will force the restore to work as you discovered. Thanks for sharing the result.

I don't think you reset it properly

Asduming you have backed it up, on ios15 it is

Settings, General, Transfer or reset iphone, erase all content and settings.

NadiaM12 Said:

"most storage was taken up by 'others'. it was other storage“

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Excellent! Great to hear that my User Tip worked!