That said, if you have a large site, the upgrade process may take longer than expected, in which case an incremental approach may help.Just remember to retain a backup of a working site so that you always have a fallback position.
Some schools and networks block (S)FTP connections, and you will need to request the ability to use (S)FTP connections (port 21 for FTP, port 22 for SFTP).
Sometimes it can take a while to complete the upload of Word Press.
I saw that message after move all my hosting files from default location to other place that allows my website running on VPS with lower permission to increase the security.
This problem is very easy to fix and stop Word Press Ask for FTP Credentials again but you will frustrating sometimes of trying to get it done if you don’t know the causing of this problem.
First off, you will need to open up your file (which if you are doing things right will be one directory above your sites root directory) and in this file you just simply have to add your ftp loing information and you will never have to type it in again, so without further ado heres the bit of code you want to add to your file.