Synchronise document library among two different sharepoint sites

Question

I have 2 Sharepoint Sites, Site A only accessible by internal colleagues due to security concern, Site B can be accessed by external party.

I wish to synchronise Site A document library with Site B document library. Whenever there is update (addition/deletion/modification for PDF, jpeg, MS Word/Excel) of file within Site A document library, Site B document library will do the same automatically.

Hope masters here can share the experience or advise on feasibility. Thanks.

Answer 1

Maybe you can try this:

"Two-way sync", as its name suggests, is able to copy files in both directions, keeping the two SharePoint Documents libraries in sync and totally same with each other.

Besides, it provides the "Real Time Sync", which will execute automatic sync as long as any changes are detected in the source cloud if you choose "One-way Sync" at the same time. If you choose "Real Time Sync"+"Two-way Sync". then the two SharePoint folders in two accounts will be synced in time as long as either has any modification. Also, 7 different sync methods are available for different requirements.

https://www.multcloud.com/tutorials/synchronize-two-sharepoint-document-libraries-7201.html#:~:text=Files%20On%20Demand-,Step%201.,%22Sync%22%20in%20the%20toolbar.