Hi
I believe you raised a support ticket so I replied there first. The internal storage is eMMC so should be quite robust. It should remain stable for many years; but a power loss can sometimes cause issues that require a reinstallation.
How did you determine that?
Do not do this. If you erase these partitions you will likely permanently brick your device.
You should only let the OSMC imaging tool do the formatting where possible.
If the installer can’t partition your device, it’s important to know if you made any changes / manually altered partitions. We expect a specific structure, and running mkfs / dd’ing can cause bad consequences:
Sam