Lost Folder: My Cloud Mirror Gen2

A 500GB folder has disappeared from my NAS. All Diagnostics checks show O.K. As it is a RAID1 configuration it has disappeared from both drives, luckily I have a cloud backup. Has anyone else experienced this? I can restore from my backup but this event has reduced my confidence in the drives reliability. Thanks, Ken.

Friend, Let me tell you about loss in confidence. I got 5 brand new 6tb drives that are all SMR… Ya… How can you tell? WD-EZZRF Something= Normal, If it has AX you were robbed at gunpoint. Please make a police report asap…