FreeFileSync Forum

Thank you for investigating and solving the problem.

I ran some tests. Every test is run once only. FFS running on Windows 10, WiFi FTP Server on Android.

Comparison times for about 11,000 files in seconds.

Huawei P30 Lite Samsung Tab S5e Samsung Tab A7 Lite
Android 10 Android 11 Android 13

FFS 11.29 48 28 32
FFS 12.0 143 110 115
FFS 12.1. Beta ...

I downgraded to v 11.29 and the comparison speed is regained. And I certainly did not change the comparison method.

Since the update to version 12.0, the comparison speed dropped significantly when using FTP. I am using FFS on Windows 10 and WiFi FTP Server on three different Android devices (A10, A11, and A13). There is no difference between plain FTP and FTPes (SSL/TLS). The file transfer itself is as fast as ...

You probably use WiFi FTP Server 2.x on Android 10 running on your Samsung S9.

I used to sync files between my Windows PC and my Phone with FreeFileSync and WiFi FTP Server on the phone. After updating WiFi FTP Server to version 2.x on my Huawei P30 Lite NE with Android 10, I observed the following ...

The Author of WiFi FTP Server released a new version 1.9.4. This solved the problem using SSL mode explicit on Android 10. Now FreeFileSync, Curl, and FileZilla can connect to the server.

PS: WiFi FTP Server allows to set "SSL mode" to "excplicit" under options, in which case connection with FreeFileSync will work.


Right, FreeFileSync used to work running WiFi FTP Server with mode "explicit" on Android 9. Unfortunately, it does not work anymore running WiFi FTP Server on Android ...

I downloaded curl-7.71.1-win64-mingw.zip from https://curl.haxx.se/windows/ and unzipped the file.
Then I tried

curl --ftp-ssl --user myusername:mypasswd ftp://p30-manfred:12345/test.txt

and got

curl: (60) SSL certificate problem: self signed certificate
More details here: https://curl.haxx.se ...

@ryang
Thank you for your comment. Unfortunately, I didn't find a secure solution. FFS version 11 has the same issue as version 10.x has. As I mentioned in my first post, reverting to an unencrypted connection makes syncing possible. But having an encrypted ftp connection to android 10 like to ...

I used to run FFS (10.16 to 10.25 Donation Edition) on Windows 10 to sync files
between Windows and two Android devices:

Samsung Galaxy Tab S5e
Huawei P30 lite New Edition

Both devices ran Android 9 and on both I used the App WiFi FTP Server with the option FTPS/SSL mode explicit. FFS worked ...