How long does iCloud photo syncing typically takes?

dell66 Said:

"iCloud storage just purchased: bought 2 TB of storage because [storage full[ [shut down[ to restart (recommended) iCloud syncing photos 'may take overnight when connected to wi-fi and plugged in done this and still nothing, still 'searching'"

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Time for Thousands of Photos:

Well, what is the Data Transfer Rate you are paying for? If 1GB/Second, then with 26GB would be 26 seconds. But that sounds absurd for rural locations. You need to have the services for all of this. But, normal photos are in the KBs (one-thousandth of a GB). So, let it sync overnight. This is not only about internal LAN speed, but also internal device storage, aswell. So, if you do not have enough internal storage on your iPhone, then all transfer would stop, and you'd have to clear space. I recommend keeping atlas 20GB of free space from, when it comes to an iPhone.

Some personal reference on clearing internal iPhone storage...

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

So, what to do...

Clear Space Using my User Tips:

• How to Clear Space from your Mobile Device, and What to Clear: - User Tip. You may have too much installed, and need to clear space. So, see my user tip: 
• How to Clear "Other" in your iPhone's Storage - Use Backup - User Tip. Caches would be being used for remembrance of application use. It is essentially the same for an iPhone. You'd backup your iPhone, and then restore your iPhone from the backup you've just created. All System Data will delete.

Depending on the size of your library the initial sync can take days. Verify the status in photos. Open photos, tap library, scroll to the bottom. Your updated status is listed.