Hi everyone!
I had a shapefile with information about wetlands, but this was so big (170 Mb). After that I used "Dissolve" for decrease the number of features, "Generalize" for decrease the number of vertex, I exported differents shapefiles according atributes. After this, I have a lot of shapefiles, all of this have less than 10 Mb (150 Kb - 7Mb) but I can't upload. Show this:

Some suggestion for this problem? I need make a map in ArcGIS Online for a Story Maps and I can't access to ArcGIS Server
Please!!