Another "leaving " post.

[Dsherman]

When FFXIV is downloading an update, it downloads a series of files. The files can vary in size rather greatly from just a teeny tiny thing to around 1.440 gig.

Each time one of those files completes a download, the updater will apply that file to the game data right away, then resume downloading on the next file.

My experience has been that if the download is interrupted, the download will pick up at the beginning of whatever file was in progress at the time the interrupt occurred. It will not have to re-do any files that were already completed.

Unfortunately, the very first file is usually one of the very biggest files to be downloaded. Which could leave you starting over from the very beginning several times if your internet is really that bad since it can take a while to complete that very first file.