Hi,
If the button to select a branch doesn’t work, it probably means the git URL is not valid. Here is an example of a valid URL: https://github.com/penncontroller/sync. Note that you cannot selectively sync one folder or file at a time. The following is *not* a valid git URL: https://github.com/PennController/Sync/tree/master/js_includes
What is the size of the bigger file that you are trying to upload? Note that each account on the PCIbex Farm has a 64MB quota, which applies to the total of files across all your projects
Jeremy