But i found in documantation :

Before installing the Open-E 30 days trial version, we like to notify
that all data on the test system will be deleted. This trial version will
only work when logical volumes are added and the underlying
HDD(s) are being formatted. If you want to run on the Open-E trial
software on a running system with data, we strongly advise you to
backup this data first. Otherwise all your data may be lost. Open-E
disclaims any liability for data lost or any other damage to your
system or data that are due to the use of the Open-E trial version.