I have old Seagate 4tb portable HDD with data and the connector broke. Internally it's two samsung 2tb hardisks combined into one using circuit/enclosure (See pics below). When I connect the drives individually, it says I need to format the drive. Where can I get this circuit/connector/enclosure so they can read as a single drive and I can recover the data?

Connect them both to your computer at the same time and run r-studio and see what it makes of them.

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Data Recovery Services in the UK.
https://www.usbrecovery.co.uk/

I only have one SATA connector so connecting them individually. Where can I find the enclosure that Seagate used in their old portable HDD

The drive are setup in raid 0 . You need access to both at the same time to recover data. You can either do that with another identical bridge or in software.

Your options

1. Fix the USB connector
2. Buy a replacement identical bridge. (ebay)
3. Connect both to a machine at once. (buy another usb - sata cable or 2 port dock)
4. Make images of both of the drives onto 1 bigger drive and connect that to your machine.
5. Image 1 drive and connect the other via sata.

After all of that you will then need to copy the files onto something else - raid 0 is a terrible idea for data storage.

Option 3 is by far the cheapest.

_________________
Data Recovery Services in the UK.
https://www.usbrecovery.co.uk/

The USB connector looks in a good condition, find someone to re-solder the USB socket.
That would save you a lot of hassle.

Option 3 it is-Ok, I was able to find another connector and connect both disks-R studio detects both of them-as two individual 1.82Tb drives. Now how do I combine them in the original RAID 0 configuration?

Don't think soldering is an option. At the point the where USB socket connects to the bridge, there seems to be slight damage to the bridge circuit itself.

https://www.ebay.com.au/itm/372680789227
https://www.ebay.com/itm/314097115680

https://i.ebayimg.com/images/g/oNMAAOSwsXZi7EBg/s-l1600.jpg
https://i.ebayimg.com/images/g/FQEAAOSwFnVi7ECn/s-l1600.jpg

The RAID chip appears to be an ASM1090R which is probably similar to an ASM1092R.

https://www.asmedia.com.tw/product/218YQ47sX2hYeySE/1DAyq49Xz0uRDjj6


The USB-SATA bridge is an Asmedia ASM1053:

https://datasheetspdf.com/pdf-file/917641/ASMedia/ASM1053/1

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A backup a day keeps DR away.

It should have been able to do that for you and presented you with a logical volume under your physical disks. https://www.r-studio.com/RAID_Recovery_ ... tion.shtml

_________________
Data Recovery Services in the UK.
https://www.usbrecovery.co.uk/

Thank you all for the valuable suggestions. I was able to get a cheap replacement bridge on ebay and then use recovery software to recover all the data.