I have the same problem, the NIC on my Central stopped working, have been trying to solve it for days, I have a USB ubuntu and I can see the drive, but there is this error:
Can´t have a partition outside the disk.
Then I tried with DiskInternals Linux Reader, which seems to be an amazing solution, and I can see the Data Folder, but the strange thing is that the public folder seems to be empty, and there is where I have most of the files, I can retreive files from other users inside the Data partiion, but its very strange that I can´t see any of the public info.
Have you mounted it using the instructions I posted? Sounds like your DiskInternals Linux Reader is not mounting it properly if you're missing data.