Each uploaded file can also be at most 20 MB. See Save a file.
Your account
Storage
See how much of your library limit files and highlight images use.
Open Settings, then Storage.
The page shows a meter, how many megabytes you have used, your limit, and how many remain. The default limit is 100 MB. The page shows the limit on your account if it is different.
Files and highlight images count toward that limit.
When you are near the limit, about 90 percent or more, ReadMeliora warns you that the library is nearly full and asks you to delete files.