Step1: Login to the cPanel account.
Step2: Open the File Manager and select Web Root and click Go.
Step3: Then scroll in the right-hand panel to the file php.ini and right-click it.
Step 4: In the pop-up menu select Code Edit and Search text field type upload_max_filesize and press enter and enter the size.
Step5: In Search text field now type post_max_size and press enter and enter the size.
Step 6: Click Save.