- Less security: FTP does not provide an encryption facility when transferring files. Moreover, the username and passwords are in plain text and not a combination of symbols, digits, and alphabets, which makes it easier to be attacked by hackers.
- Old technology: FTP is one of the oldest protocols and thus it uses multiple TCP/IP connections to transfer files. These connections are hindered by firewalls.
- Virus: The FTP connection is difficult to be scanned for viruses, which again increases the risk of vulnerability.
- Limited: The FTP provides very limited user permission and mobile device access.
- Memory and programming: FTP requires more memory and programming efforts, as it is very difficult to find errors without the commands.
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