A means of syncing specific directories in Locaton A with the same in locaton B, whereas the file with the most current date/time stamp, overwrites the older file

A means of keeping data in sync on specific folders over the internet? Mac VPN tunel?

I have a user that is working from SC at times and in NY others.  all his data resides locally on his Mac in the NY office.  He had asked if there is a way to sync the data to the two physical locations.  Anyone come across anything that could work for this specific request?

alternative solution:  I am thinking either he remotes in to NY from SC and uses something such as GOTOMYPC and the data remains in NY, or possibly a NAS with security, which we may be able to grant access via a url etc.   Otherwise the software would have to have the intelligence to take the files with the most current date/time stamp and overwrite the older of the files regardless of which location the files existed etc.  He could be talking about as much as 200-300GB of data.
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JohnBusiness Consultant (Owner)Commented:
I would use (DO use) Sync Back Pro for this. It can determine newer vs older files, orphaned files and collisions (same file changed in two locations) . Excellent software made for this
LICOMPGUYAuthor Commented:
Hey John
I will look into it! Thanks, so it is done over the internet don't need to establish a P2P or VPN?

This will  allow you to edit in one physical location, and know it needs to overwrite the older file regardless of where it was edited most recently?  Works okay with nested folders as well?  Does it work pretty much real time, always scans for changes?

JohnBusiness Consultant (Owner)Commented:
You need a secure connection. I use VPN to connect remote locations
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LICOMPGUYAuthor Commented:
Thanks, different question altogether then. Mac VPN, just client to client, or you were using a firewall that has VPN capabilities on both ends?
Thanks again!
JohnBusiness Consultant (Owner)Commented:
Hmm.  Should have read further. Sync Back is just for Windows.

For me, Windows and VPN at the remote site either site to site or Client to site.
JohnBusiness Consultant (Owner)Commented:
I'm back. It appears Sync Back Pro can run on a MAC.  I live by this tool ensuring all my many files are properly synchronized.

JohnBusiness Consultant (Owner)Commented:
I should also clarify "connection". Sync Back requires sites to be connected and be able to map folders. If you have a secure connection that is not VPN, that is fine.

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If you know command line.  The built in rsync command can do exactly what you want.  You just need to share the NAS and mount the share

rsync -a /Users/username/folder/to/sync/ /Volumes/NAS_mount

Otherwise just get Chronosync or use Time Machine and it will do all that for you, with deduplication.
Eoin OSullivanConsultantCommented:
If the devices in NY and SC are both Apple Macs then look to serialband's advice as SyncBack requires at least one Windows PC in the equation.  There are lots of ways to do what you need but it depends on several factors

If both devices are on a reliable Internet connection and both 'always-on' then you can ssh (remote shell) connect directly (or via a VPN) into one computer from the other one and run the rsync command (free software built into OSX) to copy the newest version of files in either direction.

If the user is a command-line phobic then software like ChronoSync has a nice interface .. costs a few $$ but can give more visual feedback and allow setup of several different types of sync and store multiple copies etc.

If one or both devices are laptops and not always on you may want to use a NAS or if the the Internet connection is unstable use cloud storage (Dropbox, Google Drive etc. etc.) which would act as an intermediate storage and would update files on both computers from the central location.

If one device has limited storage and cannot keep 300Gb  of data .. or if there are 100Gb of changes in the files on a regular basis then the intermediate storage of a NAS or cloud-storage is probably best.  

If the data is highly sensitive or private and the user doesn't trust a commercial provider then a NAS device is easy to buy, configure and operate.
Dropbox claims to be secure now, but if you want cloud security with zero knowledge of your data, use Spideroakone. (https://spideroak.com/)
LICOMPGUYAuthor Commented:
Thank you all!
JohnBusiness Consultant (Owner)Commented:
You are very welcome and good luck with Sync Back
LICOMPGUYAuthor Commented:
Thank you
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