In a WordPress Multisite network, the upload limit is controlled both by the server and the network settings .
- Server Level: Go to cPanel > Select PHP Version > Options and increase
upload_max_filesizeandpost_max_size. - Network Level: Log in to your WordPress Network Admin, go to Settings > Network Settings, and update the Max upload file size field (in KB). Both settings must be aligned to take effect on your Hostaday server .