Is your feature request related to a problem? Please describe.
If for some reason you have to execute a redownload, it is nice if the previously successful content is not redownloaded.
Describe the solution you'd like
Check if some content is already downloaded (e.g. the files already exist).
Describe alternatives you've considered
An option would be to also group lesson files into separate directories and check if the directory exists.
Is your feature request related to a problem? Please describe. If for some reason you have to execute a redownload, it is nice if the previously successful content is not redownloaded.
Describe the solution you'd like Check if some content is already downloaded (e.g. the files already exist).
Describe alternatives you've considered An option would be to also group lesson files into separate directories and check if the directory exists.