G-RAID File Recovery Needed

I've received the following questions from people wanting to recover files from G-RAID hard drives that have developed one fault or another. It's worthy to note that G-RAID hard drives sometimes run a RAID file structure which see's the files stored on the hard drives in a distributed segmented way rather that sequentially. Subsequently data recovery on RAID hard drives can be problematic. My advice with all RAID data recovery occurrences is to take the RAID to a data recovery expert - personally I use the guys at http://www.recover-deleted-data.co.uk/ when I've got to get files back from any sort of RAID device, not just G-RAIDs. Here are the questions:

Thunderbolt G-Raid drive is recognised by computer and you can see the files on the disk. But when you try to browse the files it crashes finder and you have to unplug it. I'm located in Manchester but can bring the drives to either Wolverhampton (Birmingham) or London locations.

I have a 4 x Seagate 2TB hard drives which are combined together into a 4 disk RAID 5 system. The system is made by a company called G-RAID but I'm unsure of which model I have. It failed on me a couple of years ago but I've never got round to trying to fix. I did take it to a couple of 'computer shops' around London (where you can mobile phone accessories – that sort of place) but they didn't have any luck.

One of our clients in Wolverhampton has an external G-RAID RAID 5 whose hard drives appear to have died, when it is connected (proprietary connector and sata) it spins briefly and then stops: It is not detected by Windows, we have tried on multiple machines. Our client is quite upset as she has family pictures and backups on the drive. Could you give us a quote to recover the drive? Inside the G-RAID the device the hard drives are Samsung 4 x ST1000LM024 1000GB. we have had a failure on one of our laptop SSDs we are after some documents recovering.