Increasing of maximum upload file size

i’m Tryed To Upload 11.8mb Music File To Media Libry(htdocs/wpcontent/uploads/2018/06)…via filezila,smartfpt…it’s Not Uploaded…why…and how to fix it

Check the knowledgebase:
https://infinityfree.net/support/what-is-the-fileupload-size-limit/