General thoughts App/Desktop about "Download all courses":

• It doesn't tells you how much space it will be use, it was thought internally like that to avoid spending MB calculating it .. could be possible to add options? Something like "let me calculate it first", "go for it", "cancel"  : ) Or shown some warning that you don't know how much MB is going to be used?
• It doesn't let you stop in case you want to (imagine you are going to leave a space with wifi and you don't want to use your own data or that you realise it is taking much longer to download than you expected)