On 11/24/2017 4:30 PM, John and Lee Wood wrote: > I have a fairly large project that contains two data sets.  Set A, > contains 28.5 thousand people.  Set B contains fewer than 100 people. > I created data set B to explore a possible ancestry for a woman in > data set A. I'm now satisfied that the woman's ancestry as set forth > in data set B is correct and I would like to addher data set B > ancestry to her in data set A.  It appears that the only way to do > this is to merge the two data sets but, given the work I have done > over the years creating the 28.5 thousand people in data set A, I'm > reluctant to take the merge data sets step for fear of loosing > everything. > > I know I will have to back up my project before doing the merge but, > is there anything else I have to worry about?  I use a cloud backup > called Carbonite and I seem to remember warnings about cloud backups > and TMG. I'm using TMG 9.05 and Windows 7 64 bit professional. John, There is a detailed article about merging data sets on my website, at http://tmg.reigelridge.com/tmg/merging.htm#datasets Your other option is to Copy or Move everyone to the main data set, then delete the second data set. That is described in my article at http://tmg.reigelridge.com/copy-move.htm Terry Reigel