Question about LaCie Rugged Mini

this is when you break the file system... you may be using cache, which is located on the disk, and then you have to eject the disk properly...you can also simply not use the cache or use a file system that is more resistant to it (ext4 -> you can tear the disk out of the system, if an os is still running on it, put the disk back in and it usually runs again, btrfs -> you can shrink and enlarge a partition while it is running, you can make snapshots of it, but unfortunately it is not yet 100% production-ready)
the problem is that windows doesn't support any reasonable file system at the moment, exfat is the best of all, but it's not the best by a long shot..., ntfs i wouldn't recommend at all, sometimes whole disks are destroyed if you just look at them crooked... (best to do both disks while making the backup...)