1. Download and install cyberduck.
2. Download the advanced profile file that let CyberDuck connect to cynny space from here
3. Double click on the downloaded profile file: Cynny Space.cyberduckprofile. It will open CyberDuck App dialog and you'll be able to insert credentials: secret/access key. press Login, and CyberDuck will connect your Cynny Space cloud storage.

NOTE: you can get information about your secret/access key by account info section of you Cynny Space admin panel.

Windows configuration

IMPORTANT: Quit Cyberduck if it is currently running before editing any configuration file

1. Open the file user.config in:

C:\Users\user_name\AppData\Roaming\iterate_GmbH\Cyberduck.exe_Url_y3p2ebapuyakx1wepw5uc1dcj54dho4b\5.3.0.21497

WARNING: you could not see any folder because they may be hidden by operating system

1. Insert the follow rows, into file user.config, under

<setting name="CdSettings" serializeAs="Xml"> into tag <settings>

<setting name="s3.upload.multipart.threshold" value="0" />
<setting name="s3.upload.multipart.size" value="5242880" />

The structure will be:

<setting name="CdSettings" serializeAs="Xml">
<value>
<settings>
<setting name="s3.upload.multipart.threshold" value="0" />
<setting name="s3.upload.multipart.size" value="5242880" />
...
</settings>
</value>
</setting>

Mac Configuration

It is enough to launch from terminal with the following commands:

defaults write ~/Library/Preferences/ch.sudo.cyberduck.plist  s3.upload.multipart.threshold 0
defaults write ~/Library/Preferences/ch.sudo.cyberduck.plist  s3.upload.multipart.size 5242880