I sure hope others are learning from this thread. It's a little disjointed on my part because I'm responding as I'm learning. I'm staying home from the FHL today to try find a resolution to this problem. It's costing me some billable hours, but I'm hoping this non-billable time will help me and others with this problem.
While I'm waiting for a response I'm reading as much as I can. Perhaps others don't know about the Rootsweb TMG mailing list, but here's a link to a year-old thread about this very issue:
If I understand correctly, and if the posters can be trusted with providing good information, it seems the TMG backup wizard is limited, only 2GB – 4GB. External exhibits, which I think my project has, along with the data can easily exceed that size.
For this particular client project I have to link every TMG event and citation to the digital image of the source. Then, I use Second Site to create an internal-use-only website. The client is a historical society and they dislike using computers and don't want to learn more than they have to about computers. So, the simpler I can make it the happier my client is. This client really likes the Wikipedia style website. So, I use Second Site to create a website that has basically the same display and linking style as Wikipedia.
The client likes to see each event linked to the source image and they also like to see each citation linked to the source image. They don't want images cluttering up the website, they just want to click on the exhibit link when needed. They also don't want to spend the time to search for the image using a "good citation", because as we all know even if you put the URL path to an image found online, that URL path is likely to change tomorrow. They don't want to have to search for a "census" image, even with a good citation, because after all that's what they already paid me to find. They certainly don't want to have to find the image in some other folder I supply to them. They want single click access to an image if they so chose. They also want to select the link to the MS Word doc so they can open the doc when necessary. I can't (as some suggested in the TMG mailing list thread referenced above) limit the amount of external exhibit links.
So, since the evidence indicates TMG backup wizard has size limitations, the work-around in my case seems to require that I make a copy of the whole folder located at: My Documents / The Master Genealogist v8. It's only 6.02 GB, so certainly not a storage limitation issue like we used to have with computers way back when.
Does anyone forsee a problem with making a copy of the whole folder to use as a backup rather than trying to use the TMG backup wizard?