Uploaded September 2025 | Updated September 2026, 1 week ago

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In this video I am explaining the issues that some people will have had with the new PCIe Gen 5 NVMe M.2 compatible version of the Acasis TB501 Pro.

For anyone interested. Here's a link to a folder with some documents during my testing over the last few weeks or so with the Gen 5 TB501 enclosures that I had sent to me. The PDFs are AI summaries from some very involved emails that I sent to Acasis during my tests since receiving the first enclosure mediafire.com/folder/rthzfu5j45mom/ACASIS_TB501_PRO_GEN_5_TESTS_AND_DATA

Here's the video where I'm talking about my issues and experience with the new TB501 Pro youtu.be/1JBkXQ4f7og

This problem is because some of the new Gen 5 TB501 Pros shipped with the wrong firmware and those who have received them will DEFINITELY have problems with them.

The firmware version that I definitely know to be an issue on the Gen 5 TB501 Pro is 56.56 However, if you bought your TB501 Pro on or after the 20th August 2025 form the Acasis website and you have a different firmware to 56.56, then I would recommend that you contact Acasis anyway and have them confirm that your firmware version is OK.

Here's the return instructions that Acasis gave me:

For those who purchased TB501pro from the official website since August 20th:
- Direct them to support@acasis.com with their order details and firmware screenshots
- We'll provide prepaid return labels (US customers) or full shipping reimbursement (international)
- Replacement units will be tested before shipping
- This costs your viewers nothing - every penny of shipping with this, is our responsibility

*Checkout my SSD speed tests & external SSD build guides playlist*
youtube.com/playlist?list=PLleKChtNUwZQvaYS9r0zHvkaTXSYlnX6q

*Some of my product recommendations*

*ACASIS Website*
If buying from the ACASIS website use my 15% discount promo code DAVID15
ACASIS website geni.us/ACASIS-51
SSD enclosures:
TB501 Pro Thunderbolt 5 enclosure geni.us/ACASIS-57
Mac Mini M4 Workstation enclosure geni.us/ACASIS-58
TBU405Pro Thunderbolt 4 enclosure geni.us/ACASIS-53
TBU401 Thunderbolt 4 enclosure geni.us/ACASIS-54
EC-3901 4 bay Thunderbolt 4 RAID Enclosure geni.us/ACASIS-55
All ACASIS SSD Enclosures geni.us/ACASIS-56
Docks & hubs:
DS9007 21 Port 40Gbps Dock geni.us/ACASIS-59
DS-7A15 15 port USB-C dock geni.us/ACASIS-60
DS-0202 14 Port USB-C dock geni.us/ACASIS-61
All ACASIS Docks and Hubs geni.us/ACASIS-62

*ACASIS Amazon*
ACASIS Amazon Store geni.us/ACASIS-105
SSD enclosures:
TB501 Pro Thunderbolt 5 enclosure geni.us/ACASIS-100
M4 Mac mini Workstation dock/enclosure geni.us/ACASIS-106
TBU405Pro Thunderbolt 4 enclosure geni.us/ACASIS-101
TBU401 Thunderbolt 4 enclosure geni.us/ACASIS-102
All ACASIS Thunderbolt and USB enclosures geni.us/ACASIS-103

*WD_Black SN850X Gen 4 SSD on Amazon*
8TB amzn.to/478cVJn
4TB amzn.to/3U7TqsP
2TB amzn.to/3Hb32jC
1TB amzn.to/3He93Mp
Other Gen 4 NVMe SSDs geni.us/Gen4SSDs

*Samsung 9100 Pro PCIe Gen 5 NVMe SSD*
*WARNING - ONLY BUY THIS SSD IF YOU ARE USING THE NEW ACASIS TB501 PRO, WHICH IS COMPATIBLE WITH PCIe GEN 5 NVMe SSDs, OR OTHER GEN 5 COMPATIBLE SSD ENCLOSURES*
Samsung Amazon Store geni.us/hBdBf
4TB amzn.to/4lpGMke
2TB amzn.to/413Jjct
1TB amzn.to/3JcjW1Z
Other Gen 5 NVMe SSDs geni.us/7SvmU

*Apple Mac Computers on Amazon*
Apple Amazon Store geni.us/Apple_Amazon_Store
MacBook Pro M4 geni.us/OLuacfl
MacBook Air M4 geni.us/x5G9
Mac Mini M4 geni.us/yJW1
Mac Studio M4 geni.us/V2lDm
Mac Studio M3 geni.us/7zws
iMac M4 geni.us/1k4pwp


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Amazon UK: geni.us/Amazon-UK
Amazon Canada: geni.us/Amazon-Canada
Amazon Deutschland: geni.us/Amazon-Deutschland

Contact for product reviews: YouTube@DavidHarry.com

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I’m David Harry. Thank you very much for watching this video, take care and goodbye now.

Cheers,
Dave.