Hi @manuel428,
On SuiteCRM 8 you can use the package of the new version as the “upgrade package”.
For instance, if you want to go from 8.0.0 to 8.0.3 you can use the 8.0.3 install package as the “upgrade package” and place it on tmp folder (according to the instructions).
SuiteCRM 8 does not use a “delta” strategy like SuiteCRM 7, you use the full package and SuiteCRM 8 will update it self by using the files on the new package. It will “fully” override it self expect for some folders that can have customizations, like “custom”, “extensions”, etc