I am having troubles uploading files larger than 4GB
If you have problems uploading files that are larger than 4GB you could try zipping the file up into segments
A zip program like 7-Zip makes this easy to do as it includes an option "Split to volumes - bytes". Entering a value of 3758096384 is the equivalent of 3.5GB and --Zip will then, for example, convert a folder with a total size of 25GB into 7 seperate files no larger than 3.5GB which you can then upload individually.
With 7-Zip the compressed files will look something like: