Unable to upload large file, what to do?
There is no size limit for uploading files, but it could be a problem if the connection is terminated when you are uploading huge files. A connection can be terminated due to lot of reasons. If you are facing this problem, try using FTP clients with "resume" feature, that way you don't need to start over again.
Note: For uploading large files, SFTP is more reliable compared to FTP.