Lightroom CC sync very slow

Same problem here. I keep doing rebuild sync data, I only have 2500 images, and it never completes the sync. I am waiting days, nothing. This service is a nightmare, I am thinking of abandoning. 

It is now 2022, 4 YEARS and no fix?? 
simply frustrating

Same issue here. Think adobe has capped the speed to 1,5MB/s. I'm trying to get my 70,000 images sync'd from Lightroom CC to the Creative Cloud.  It is taking days.  My internet is fiber and testing above 150-300 up and down.

Really disappointed.

It is already 09/2020 (the original post is from 01/2018).
I have 294 new HiRes JPG photos and it has been running for over 24 hours.  My speed test results: Download: 652 MBPS Upload: 907 MBPS (gigabit service).  This is simply ridiculous. 

Yesterday, I installed Lightroom Classic after Lightroom CC had failed to upload all of about 4500 photos for nearly a month. About 2000 photos have been downloaded as a result of syncing after one day.  I had hoped to avoid re-editing the photos by syncing with CC, but now I see the least time consuming approach will be to delete the CC account, zero out the Classic database, and then upload all images to my computer from original media.  Luckily for me, I am not a professional.  The workflow of a pro could not tolerate such sluggishness.

Netherlands based user: I am also experiencing slow upload speeds, I synced the same number of files (~3500 JPEG's + some RAW's: ~45GB) to iCloud, and then to Lightroom. This took some 8 hours for iCloud Drive. After that I uploaded to Lightroom which has only synced about 800/3500 files in 14 hours.We use cable internet which is very stable, I have been using a plethora of cloud services for data transfer (including Lightroom sync back in 2017). It's an apples to apples comparison which indicates to me adobe cloud is doing something wrong here. 

I'm annoyed by the lackluster and unprofessional response by adobe in this thread. I suggest you stop laying blame with upload speeds and acknowledge something is not going the way it should, especially for a cloud based product in 2020.

Dear all, 

I am experiencing the same slowness in synchronizing. I made 10 photo's on my iphone 8 today, which are saved in the Lightroom app on my phone. When opening lightroom on my desktop it takes more than 3 hours already and non of the photo's have been synced yet, in the mean time an indication is saying the photos are loading. I don't understand why it should take so long. Do you have any idea how to solve this? 

Best regards, 
Ewoud

Just want to add my experience here as well:

I have a business DSL line here that gives me over 100MB/s download and up to 37MB/s upload speed.

Naturally one never reaches these speed in real live but as I am running a fileserver from my office I know that I can get easily 70MB/s down and about 30MB/s upload speed from here.

I once tried to use the sync function and gave up as it was unbearably slow. That was two years ago. By now I hoped that Adobe has done their homework but it doesn't seem like it.

I shoot fashion catalogue for a living and produce large numbers of files a day. The idea that I could edit/cull whilst my digital operator still works on other tasks in Lightroom Classic sounded great.

Long story short: July 2019 and the sync function is completely unusable (at least on a professional level).

I ran multiple tests by now and got at best 4MB/s download speed and 520KB/s upload speed form my system. That is about 5% of the possible bandwith for download and less than 1,5% of the possible upload speed.

Naturally I contacted Adobe customer service as I am paying a rather expensive subscription plan.

Their answer: This is generally a problem of router settings or internet problems, nothing they can (or want to!) help with.

As pretty much any other internet connection from this computer and this office is able to saturate the bandwith I think it is safe to assume that the fault lies with Adobe.

I used IP tracking software and located the server destination Adobe is using somewhere between Washington and Oregon State in the US. Speed tests running from my location (Berlin/Germany) to the  public server closest to the destination of all the uploaded sync data ,Kennewick Washington, give me about 80MB/s download and a maximum 3.5MB/s upload and an awful Ping of over 170ms.

So clearly the connection from Europe to there is pretty horrible (strangely download speeds are ok) plus Adobe seems to use cheap or bad server architecture that is not designed to handle the data volume required for such a system.

I would love to hear from other users that might have tested the up- and download speeds in other countries. My guess is that the experience will differ, depending on your geographic location.

To me it seems that Adobe is advertising a service and a system that is nowhere near ready for professional use or the company simply is to cheap to invest in the required server and broadband structure needed.

A massive fail for Adobe, and that includes the rather smug and useless customer service.

Would love to hear actually from Adobe. So far I could not find any useful or helpful information in this forum or from Adobe.

And if Adobe is not willing to invest in the technology necessary to make sync a useful feature: Just terminate it or even better - consider making local sync to servers of the users choice an option.

Same problem here. I just got back from a gig on the road. Everything uploaded to the cloud quite quickly from my iPad, even in China! But now that I'm home it's taking forever to sync 2500 raw image back into LR Classic on my PC. Totally unacceptable!
UPDATE: If I go to preferences > Lightroom Sync and hit ALT/Rebuild Sync Data there is a flurry of activity with LR downloading 100-300 images in a reasonably fast tempo. But after a while all activity seems to grind to a halt. I did this 4 times, with the same effect every time. Any explanation for this??
I will just keep doing this until all are synced. A bit of a hassle but better than waiting 3 days...

I don't know if this applies to anyone or everyone but I believe my IP throttled my download speed for large files temporarily. I was nowhere near overuse but I hypothesize it threw up red flags. It may have been uploading multiple files at once. I took a break until it was normal again and then synced a set of folders at a time instead of trying to let it go continuously. Now that it is done it is fine.