Why Is FTP File Transfer So Slow Through FileZilla?


File Transfer Protocol (FTP) is a technology used to transfer files between computers over a network with the use of FTP client (such as File Zilla), a command-line tool or a web browser. Although FTP is a convenient way to transfer files, the procedure is often incredibly slower than others and a lot of users experience FTP file transfer so slow.

Download the Diagnostic

There are certain situations when missing entries in your registry and registry corruption causes this problem. Try running a registry scan to identify if there are any such issues.

  1. Click the button below to download and install the Diagnostic
  2. Perform a Registry scan and fix any problems detected.
  3. Restart your computer.

Estimated Download Time: 10 Seconds

Limit Max Allowed Connections

FTP file transfer so slow problem is experienced when there are too many concurrent connections overloading your bandwidth.

Limit the maximum number of concurrent connections allowed. The default value is 10. I recommend lowering it to 1 for optimum performance.

1. Open FileZilla.

2. Click the File menu on the menubar.

3. Select Site Manager.


4. It opens a new dialog. Select My Sites option in the left-hand side list box.

5. Click New Site.

6. Specify a Name for the new site, and press ENTER.

7. On the right panel, specify your Host (Example: ftp.yourwebsite.com)


8. Specify Port (Optional), Logon Type: Normal.

9. Enter the User and Password.

10. Click the Transfer Settings tab.


11. Select the Transfer Mode to Default.

12. Check-up the box named Limit number of simultaneous connections.

13. Set 1 as the Maximum number of connections.

14. Click Connect.

15. In the case of the unknown server certificate, you’ll be prompted to confirm carry on connecting. Click OK.


Set Higher Process Priority

Process Priority manages CPU allocation to each process. Set higher priority to the FileZilla process.

1. Press Windows Key + X.

2. Select Task Manager.

3. Click More details.


4. Click the Details tab.

5. Right-click FileZilla.exe process.


6. Select Set priority | High.

Disable Disconnection Timeout

At times your server fails to communicate with the FTP client in a particular period. This quiet moment can automatically trigger timeout, and the connection will be closed and established again. You might want to disable this feature by setting zero as the Timeout interval. As default, FileZilla sets 20 seconds timeout and permits the maximum of 9999 seconds.

1. Click the Edit menu.

2. Select Settings.


3. Click the top node Connection in the left tree view.


4. On the right-hand side, specify Timeout in seconds to 0.


5. Click OK to fix FTP file transfer so slow.

Has Your FTP File Transfer So Slow Issue Fixed?

No matter how good Internet speed you have, a poorly configured and extremely lagging Windows PC can slow down the actual speed of your FTP connection.

It is, therefore, crucial to optimize Windows 10 PC on regular occasions to boost your FTP performance.


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