In my project, test cases located in Jira Zephyr. I have some troubles with Zephyr as you know ( lack of preconditions for test cases, native support for BDD ...). So I decided to switch test management tool to Xray.
I haven't found any solution to migration my test cases from Zephyr to Xray.
After that new issue is:
Is there any problem if i install Xray to Jira account while Zephyr is staying on?
Those 2 tools are two different plugins for JIRA, so they can co-exists and be used in parallel (by the same or different teams).
In order to migrate data you have 3 ways:
Migrate by yourself (complicated)
Ask Xray to help you with the migration
Ask a 3-rd party consultant/vendor company to help you with this. Here are a few
.. many more (just google)