P: I would like to synchronize over LAN/Cable instead of internet

Since Lr mobile now is able to work with RAW files it should allow local sync using Wifi or cable connection via a local network. RAW files typically have a large size which makes it practically impossible to sync hundreds of images via the cloud. RAW editing doesn't make sense without local sync possibility. And it should be possible to stop syncing if I wish to do so.

Agree completely. Wifi much too slow to be useful for larger raw files

Another vote from me for LAN sync from Lightroom Desktop to Lightroom Mobile. Even on a dedicated 100Mbps finds line (100down and up) it never maxes out my connection and syncing a few thousand images from latest shoot takes hours.

LAN sync will greatly increase the number of people who will end up using Lightroom Mobile.

If the developers are looking for how best to implement it, take a look at Dropbox. They have an option to enable LAN sync and then whilst a slow sync is continuing to the cloud in the background all local devices are sync'd super fast over gigiabit Ethernet or wifi.

I'll add my voice to the chorus on this. I took almost 4000 photos on a recent vacation, only took my iPad mini and iPhone with me to back up my cards each night. It would have been great to go directly from what I already had stored on my iPhone to desktop Lightroom when I got home, but having to pass all that data up to Creative Cloud then back down to my desktop would have been ridiculous, so I just downloaded the cards directly to my desktop instead - there was no point in actually working on the photos in LR mobile while on the trip.

At this point, Lightroom for mobile is a decent product that is getting better, but is severely hampered by Adobe's (seeming) desire to use it as a wedge to drive people to Creative Cloud for syncing. It may be easier to sync via CC for the developers at Adobe, but it's a workflow nightmare for users. Local sync over wifi (or even USB) is the only practical solution, so if Adobe wants to continue to require a CC membership to sync, it needs to build code into LR CC to handle local sync.

I'd be OK with bluetooth as well. Or frankly, even via cabled USB sync? There just needs to be a way to avoid everything going up to the cloud via the net, then down to the device, then back up, then back down for the exact reason you mention.

I use Lightroom as much to cull bad photos as to edit them (wildlife; you take a lot of shots!)  and had hoped to sit on the couch with my iPad and flag photos for deletion after zooming in, etc. Currently, this is just too slow a process to be possible.

The internet might be ok if you're working at home or in your office, and you live/work in an area where there is reliable, fast broadband.  

When travelling - in hotels or guest houses or cruise ship - it's just not feasible to even remotely assume that a suitably fast and reliable internet connection will be available.  And don't forget there is the rest of the world might not have the coverage of broadband we're used to in our homes.

Forgive me if this subject has already been discussed, but it really is about time Adobe introduced local sync via cable / wifi for Lightroom CC. As a developer and DBA I cannot accept the excuses Adobe have already given for refusing to add local sync, especially given how large smart preview files can be. Even worse, is the lack of sync of smart albums and folders. I work as a DBA and as a developer and (I'm sorry Adobe developers) these facilities are very easy to add, and should be added as soon as possible. Adobe developers, you have no valid reason to not add support for local sync and sync of smart collections and folders.

Relying on CC sync is too problematic and far to slow to make Lightroom Mobile a serious part of any reasonable workflow.

Come on Adobe developers - pull your socks up and do the job properly

It still uses internet... WiFi is just the means to which your devices connects to the internet. The size and quantity of the photos also plays a role. When you sync it goes to the Adobe Cloud and from there syncs to your phone or iPad. No internet... no syncing. The speed of the internet connection will also play a huge role.

Greg, I am curious.
I have Windows-10 with a home WiFi network. My iPhone-5 can connect to the WiFi and sync my Lightroom 'mobile' collections. I do not use mobile data on the iPhone (very 'old school')
You may just need to investigate the setup for your iPad WiFi.
Mine is syncing as I type.

I take a LOT of pictures doing wildlife photography and many of the initial captures are garbage. I would love to sit on the couch and cull the images on my iPad in LR Mobile, however it is not currently practical. Syncing back to my main collection is very time consuming via the internet and uses a ton of my internet bandwidth allowance very quickly. The ability to sync using my own wifi network or even bluetooth would be a game changer for me.

We got RAW. That was half the battle. (Thanks for that!) Now on to a fast, easy way to get the culled/edited pictures into my main collection.