Hi Ros,
StorSimple 8000 series will reach its end-of-life in December 2022. Microsoft provides a dedicated migration service for StorSimple 8000 series volumes and their backups. To avoid data loss, it's imperative that you plan, test, and complete your migration as soon as possible. I will suggest you to carry ou the migration asap and without risking the data loss.
Migration is currently an assisted operation. If you intend to migrate data from your StorSimple 5000-7000 series device to an 8000 series device, you need to schedule migration with Microsoft Support. Microsoft Support will then enable your subscription for migration. For more information, see how to Open a Support ticket.
Hope this helps.
JS
==
Please Accept the answer if the information helped you. This will help us and others in the community as well.