Hi! I was going to  build on the XEM base a library with files 1Kb-1Gb inside . But on digging deeper I'm a bit desperate now: XE is an excellent platform to run the project from one side, from other - completely unclear how to make it safe :-(  On filesystem storage implementation, there are several sufficient question are still beyond of understanding: 1. Clustering and/or mirroring XWiki. When data was stored completely in the Database Engine - it was more or less clear how to build following system: Customers -> Master Server --> Mirror Server If  Master Server is down - we easily switch customers to Mirror Server. Afterwards we restore full configuration and get back necessary redundancy. With filesystem storage mirroring mission becomes impossible? 2. Backup process. Database data backup is also more or less clear. When filesystem storage turned on, there is painful moment of synchronizing backup moment both for data in Database AND data in Filesystem. The only Idea I have for now: stop everything, backup everything, run everything. IMO it's not the best solution due to quite annoying downtime.  Are you going to implement such a functionality inside? What is the best pactice to implement backup in a right way? If you already have a solution, kindly ask you to share the information. :-) Best regards, Dmitry Bakbardin