Mac Studio M1 Max udb-c power

I'm not by any means a NAS expert, but I pretty sure that a NAS box uses a different drive format than what you need in a normal drive enclosure like the Inateck FE2101.

To use drives in the Inateck FE2101 box, I'm pretty sure that they need to be formatted so the the Mac can read and write to them.

see > Erase and reformat a storage device in Disk Utility on Mac - Apple Support

Keep in mind that erasing and reformatting will wipe an existing data on the drives.

What made you choose the WD Red NAS, instead of the WD Blue or another brand???

https://www.westerndigital.com/products/internal-drives/wd-blue-sa510-sata-2-5-ssd#WDS100T3B0A

https://www.crucial.com/ssd/mx500/ct1000mx500ssd1?cm_mmc=google-_-us-_-shopping-_-shopping

https://www.bestbuy.com/site/pny-cs900-1tb-internal-ssd-sata/6385543.p?

https://eshop.macsales.com/item/OWC/S3D7E6GD10/

a True Network Attached Storage (NAS) device will run Linux, and provide simulated MacOS file support inside a file.

But this sounds like it is merely an enclosure, and calling those drives NAS drive is just marketing-speak for "sever-type drives". That implies they might be suitable for 24/7 operation, and not much more.

Be sure to ERASE and new drive you get with Disk Utility. Otherwise, it may try to simulate MacOS files system inside a window New Technology File System (NTFS, the W is silent because there ARE no other Operating systems). if the manufacturers drives are not loaded, such as during recovery, the drives may not be accessible.

In my opinion, and external enclosure should have its own power supply. When the Mac sleeps it will reduce the supplied power, and some enclosures behave 'less than gracefully' when that happens.

The four rear USB-C ports are all Thunderbolt ports. Each TB port supports about .9A of current.

USB 3.0 @ 5Gbps is plenty fast enough for SATA 2.5" SSDs.

I would try using the supplied USB-A to USB-C cable.

Mac Studio - Technical Specifications - Apple

Ah' OK.

The size of the SSDs should not matter.

What brand were the 500GB SSDs and how were they formatted?

What brand are the 1T SSDs and how are they formatted?