Photos missing transfer from iPhone 12

I should be 'simple' IF the missing photos are in the same place, all of them.

You didn't say how you copied them over either?

Yes, on the iPhone (I have a 12) the Photo's app under Library does have a few options on the bottom and one is All Photo's.

Discovering what is missing could be easy, on the PC using Explorer, open the folder the pictures are in and sort of date... If you are lucky, and the pictures were transferred sequentially by date, the last one shown would be where to start the transfer again from the phone. However, that sounds easy but it isn't probably. If you select DATE as the option on the phone, you'd have to SELECT individually all the photos you missed... that is a lot of work.

I use Dell Mobile Connect and connect to the iPhone that way.

On the DASHBOARD select FILES.  Then PHOTOS and they should be by month. On the lines for months, if you put your mouse over the month, there is a check box to select all in that month. Do that for all the months that pictures are missing. You can manually unselect those that are already on the PC. At the bottom when you select the first month you'll see COPY TO PC... Select all the missing months, then COPY TO PC, select where and start the copy. Should fix you right up.

There are other programs that might work as well too. Might not even need a program I recall?

In older iPhone the photos are seen in multiple folders of iPhone DCIM when you use desktop to view (after allowing desktop access by clicking allow on iPhone).

If the photos are copied over to pc in folders of same name, then you may try compare same name folder contents between iPhone and pc.  Try recopy those folders that have discrepancies (pc folder < iPhone folder).  You could choose option do not copy files that r already there in pc.  I know this is a painstaking process and iPhone software did not make it easier. On my android it was much easier (albeit less secure).

Or just select "all of them" on the phone and copy them over into same folder on the PC.

If Windows sees that a file name already exists in the folder you selected, it will ask to skip or replace. Just click skip. The ones that are missing on the PC will be copied without Windows asking you....

Open PHOTO Application 

Connect your IPHONE and choose Import form photo application. 

It Downloads all the pics in Pictures folder on your computer. If  you take a few pics afterwards and connect a phone it automatically check which photos are new and imports only them 

Transfer Photos and Videos from iPhone to Windows 10 PC! [2022] - YouTube

Methods to fix -

Method 1 

If you have turned on iCloud Photo Library, your videos and photos will be uploaded to iCloud automatically. You can check your iCloud Photo Library to see whether your lost iPhone photos are still there. If so, you can download and recover them to your computer. Here is how:

Step 1 Sign in iCloud account
First, go to Apple official site (iCloud.com) on your browser, and you'll be asked to type in your Apple ID and passcode. Do as it required and enter your iCloud account.

Step 2 Download Missing iPhone photos

Select the Photos app. And then pick the images you lost due to failed iOS 12 update. Click the "Download" icon to export them to the local folder of your computer.

Method 2
If your photos do not appear in iCloud.com > Photos, you can restore a backup from iCloud. But first you need to efface all content on your iPhone, please make sure you have made a backup for it. Next follow the quick steps below to recover lost photos from iPhone.

Step 1Erase all content and settings
Open your phone and then go to the "Settings" > "General" > "Reset", and press the "Erase all content and settings" button to clear all the data and settings of your device.

Step 2 Restore lost pictures via iCloud backup
Then do as the onscreen instruction said and tap the "Restore from iCloud Backup" option when it comes to the "Apps & Data" screen. Enter your username and passcode to sign in iCloud account and then pick the backup file that may contain your missing photos to start recovery. Wait a while till the restoration ends, and you'll see the lost pictures come back on your phone.

Method 3
Similarly, if you have synced your iPhone data with iTunes regularly, you can also restore a backup from iTunes to recover lost photos on iPhone after updating to the latest iOS 12.

Step 1 Launch iTunes and connect iPhone to computer
At first, launch the iTunes app on the desktop of your computer. Then use a USB cable to connect your device to the computer. Tap the "Trust" option on your phone when iTunes asks you to trust this computer.

Step 2 Restore iPhone pictures from iTunes Backup
After iTunes detected your phone successfully, you can hit the small iPhone icon and go to the "Summary" > "Backups" > "Restore Backup"; or just go for the "File" > "Devices" > "Restore from Backup" from the drop-down menu. Now hit the "Restore" button and wait until the restoring process is completed.

Greeting,

Rachel Gomez