DFU is the most deepest reset that you can do on an iPhone.   It eliminates the 
iOS and you need to download it from Apple.
Jim Weiss
[email protected]

“Life is a succession of lessons which must be lived to be understood.” | Helen 
Keller

> On Sep 25, 2018, at 3:20 PM, [email protected] wrote:
> 
> Thanks, what is DFU?  
> I have 27 apps or 25%, Facebook largest at 513 MB.  
> I have 144 photos which is 78.1 MB.  
> 1.79 GB space available.
> Version 12.0 168366 
> All above seems okay but next time I’ll install from ITunes.  At least that 
> is what I read on web.
> I did a backup today to this PC.  
> I forgot when I first tried to upgrade to IOS 12 I got an error.  Tried again 
> and successful message.
>   
>  
> From: [email protected] 
> <mailto:[email protected]>[mailto:[email protected] 
> <mailto:[email protected]>] On Behalf Of Jim Weiss
> Sent: Tuesday, September 25, 2018 2:42 PM
> To: [email protected] <mailto:[email protected]>
> Subject: Re: How many GB is IOS 12?
>  
> There is nothing for you to manually clean-up after an install.  Once you 
> have a good install on the device the installer performs the clean-up.
> Keep in mind not all developers do a nice and tidy clean-up, Facebook comes 
> to mind.  My current Facebook app is consuming 1 GB of space on my 8 Plus.  
> The only real way to reduce that back down to about 140 MB is to delete the 
> app, and download the app again.  Since I typically do a DFU reset on my 
> phones once a year I typically don’t worry about apps that don’t clean-up 
> nicely after themselves.
> Jim Weiss
> [email protected] <mailto:[email protected]>
> 
> “The National Federation of the Blind knows that blindness is not the 
> characteristic that defines you or your future. Every day we raise the 
> expectations of blind people, because low expectations create obstacles 
> between blind people and our dreams. You can have the life you want; 
> blindness is not what holds you back.” National Federation for the Blind
> 
> 
>> On Sep 25, 2018, at 1:58 PM, [email protected] <mailto:[email protected]> 
>> wrote:
>>  
>> How do I clean up after install?  Thanks.
>>  
>>  
>>  
>> From:[email protected] 
>> <mailto:[email protected]>[mailto:[email protected] 
>> <mailto:[email protected]>] On Behalf Of Jim Weiss
>> Sent: Tuesday, September 25, 2018 12:59 PM
>> To: [email protected] <mailto:[email protected]>
>> Subject: Re: How many GB is IOS 12?
>>  
>> The download sizes vary between the different devices.  For example I have 
>> an iPhone 8 Plus and an iPhone 8 and there are two different downloads 
>> required when updating each device.
>> I have updated my 8 Plus and the download to disk was just shy of 4 GB, my 
>> updated phone shows that the iOS is using almost 10 GB on the actual phone.  
>> The downloaded file is a compressed file which is extracted, installed and 
>> then cleaned up.  The physical install file is still on my Mac hard drive, 
>> but any temporary files used during install should be cleaned up after a 
>> successful install onto the phone.
>> Jim Weiss
>> [email protected] <mailto:[email protected]>
>> 
>> “You have brains in your head. You have feet in your shoes. You can steer 
>> yourself any direction you choose. You're on your own. And you know what you 
>> know. And YOU are the one who'll decide where to go…” | Dr. Seuss
>> 
>> 
>> 
>>> On Sep 25, 2018, at 12:13 PM, Marie <[email protected] 
>>> <mailto:[email protected]>> wrote:
>>>  
>>> Wouldn’t the end result be the current IOS plus the amount of GB in the 
>>> download?
>>> Marie
>>>  
>>>  
>>> From: Sieghard Weitzel 
>>> Sent: Tuesday, September 25, 2018 7:59 AM
>>> To:[email protected] <mailto:[email protected]>
>>> Subject: RE: How many GB is IOS 12?
>>>  
>>> I have an iPhone 6S Plus and if I go to Settings > General > iPhone Storage 
>>> it says for System at the very bottom 8.74 Gigabytes.
>>> My phone is a 64Gb model and at the top it says that I am using only 18.7 
>>> Gigabytes of my 64 Gigabytes.
>>> If the System takes up 8.74 GB that means I am using 9.96 for apps, here 
>>> Auible uses the most storage because I have several books downloaded and it 
>>> shows as 2.49 Gigabytes, Facebook is next with 540.7 Megabytes so these two 
>>> apps alone take up about 3 Gigabytes of the 9.96 used by apps. I have a 
>>> total of 64 apps on my phone.
>>>  
>>> From:[email protected] 
>>> <mailto:[email protected]><[email protected] 
>>> <mailto:[email protected]>> On Behalf Of [email protected] 
>>> <mailto:[email protected]>
>>> Sent: Tuesday, September 25, 2018 7:13 AM
>>> To:[email protected] <mailto:[email protected]>
>>> Subject: RE: How many GB is IOS 12?
>>>  
>>> I called Apple and technician said that IOS 12 is 10 GB.
>>>  
>>>  
>>> From:[email protected] 
>>> <mailto:[email protected]>[mailto:[email protected] 
>>> <mailto:[email protected]>] On Behalf Of Richard Turner
>>> Sent: Tuesday, September 25, 2018 9:32 AM
>>> To:[email protected] <mailto:[email protected]>
>>> Subject: Re: How many GB is IOS 12?
>>>  
>>> It is around 2GB. Can you update via a computer using iTunes?
>>> Since you only really have a bit over 12 GB to start with on a 16 GB 
>>> device, it is a pretty high percentage of your storage space. 
>>> HTH,
>>> Richard
>>>  
>>>  
>>>  
>>> xpert: an ex is a has-been, a spirt is a drip under pressure. -- Bruce U. 
>>> Utah Phillips
>>>  
>>>  
>>> 🦅
>>> 
>>> On Sep 25, 2018, at 4:11 AM, "[email protected] 
>>> <mailto:[email protected]>" <[email protected] 
>>> <mailto:[email protected]>> wrote:
>>> 
>>>> I have 16 GB Iphone6.  I have lots of apps, no music no videos and limited 
>>>> mail and texts…
>>>> Upgraded to IOS 12.
>>>> I got a space issue when updating Facebook.  
>>>> Deleted some apps but did not free up much space
>>>> Open General settings then IPhone storage went to bottom system is 10.05 
>>>> GB.  
>>>> Is IOS 12 this big?  
>>>> Thanks,
>>>> Ann
>>>>  
>>>>  
>>>>  
>>>>  
>>>>  
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