Slow external enclosure NVME

Hello All,

I have this problem. A WD1TB NVME drive and two external enclosures. BAd,

slow transfer, every now and then "disk not ejected properly" message. Disk new, cases new. HArdware Test shows no errors. Another disk in an OWC enclosure works without problems. I tried with Monterey which is native and now with Ventura and same thing. Well I don't know what to do and I have run out of ideas. PRAM, SMC was reset. Very rarely the drive returns to normal speeds. On Blackmagic very slow testing .

Model Name: Mac Pro

Model Identifier: MacPro6.1

Processor Name: 10-Core Intel Xeon E5

Processor Speed: 3 GHz

Total Number of Cores: 10

Memory: 64 GB

Disk Utility is also very opry with this kit :(