most BMW programs are now huge 50gb+

 Also SUPPORT can you please tell us what has been added to BMW or do we have to guess as usual.

    Just because they change something with a update you still have to download the whole program each time. The more stuff they put in it the bigger the program gets.

 Yes some BMW models can take up 10 hours but I haven't seen 1300m maybe your internet connection too slow, or try to do I-level entire CCC system.

 He means the download of the MaxiSys update.

Don't know why this is, things that did not change should not be needed to be downloaded again, only the files that changed.

Might be an idea to create a special update tool that does only update those changes files and compresses them for uploading (and unzips them on the tablet). The download speed is slow from Autel's servers (have about 100mbit myself but Autel is choking the speed for updates).

Think the large size of BMW might have something to do with differences in software for each model and/or included flash updates that are already (largely) on the tablet. Not sure about this however, did not check so far.

 For me, I think is better to download all the software. It's more safer. Even in the original tools, sometimes, when you do only the updates it start to show some software error.