What is the file/upload size limit?
On all InfinityFree servers is a file size limit of 10 MB. It's important to note that this is a file size limit and not an upload limit.
The difference is subtle, but important. An upload limit could be set through PHP settings, but this limit is enforced on the file system level. No PHP configuration can override this limit and it applies to files uploaded through FTP or the file manager as well.
Can the limit be increased?
No. The size limit is fixed and cannot be increased in any way. 10 MB is more than enough for regular website files (scripts, images, HTML files, etc.).
If you need to upload a larger script, plugin or theme, you can work around it. See this article on how to upload big files. If you want to upload large, downloadable files or video files, please use a specialized service for that (e.g. YouTube for video or MediaFire for downloadable files).