seanwebster said:At that point you wouldn't be testing the actual portable SSDs as they are, you would just be testing the performance of the internal SSDs in that one enclosure. Thus, comparing just the underlying storage alone. You can't compare the performance or thermal characteristics of these portable SSDs without using the default enclosures and bridge chips. The new SanDisk Extreme Pro v2 comes with some changes under the hood, too. A new ASMedia ASM2364 bridge controller communicates with the host at faster speeds because it has twice the PCIe lane count as the ASM2362, which means twice the throughput. Not only does it maintain a speedy 20 Gbps link while connected to a PCIe 3.0 x4 SSD, but it also features link power management to reduce idle power consumption. The controller also supports Trim to keep performance predictable. Editor’s Note, August 17, 2023: As recently reported in Ars Technica , a critical mass of users on SanDisk’s forums and Reddit have reported failures of some SanDisk Extreme, Extreme Pro, Extreme V2, and Extreme Pro V2 SSDs, resulting in data loss, as well as the drives becoming unreadable/unmountable. In May, parent company WD released firmware updates for the 4TB SanDisk Extreme, as well as the 4TB, 2TB, and 1TB Extreme Pro models, plus the 4TB Western Digital My Passport, but complaints continue. We are doing our own stress-testing of the sample drives we originally reviewed. As of today, however, we no longer recommend buying any of the aforementioned SSDs, until we are satisfied the issue has been resolved. ( A class-action suit has been levied against WD surrounding issues with these drives.) We have left our original review in place here for reference.] Get powerful NVMe™ solid state performance featuring 2000MB/s 2 read/write speeds in a portable drive that’s reliable enough to take on any adventure. In a thread about 4TB Extreme Pro drives in a film and video editors subreddit, a Reddit user called ian__ wrote:

SanDisk 4TB Extreme Portable SSD - Up to 1050MB/s - USB-C SanDisk 4TB Extreme Portable SSD - Up to 1050MB/s - USB-C

Also you need to tear down the External drives in each review to see which NVME SSD is in there ... it will also help you to determine TBW/IOPS if the external drive does not say just by discovering which NVME SSD they are using inside.Some unconfirmed chatter suggests that the SanDisk Extreme SSD issues affect only those using devices "manufactured after November 2022." Still, at the time of writing, we would advise anyone using these drives to use them with extreme caution. Perhaps it is advisable to only use these storage devices for convenient duplicate or temporary data until the fix arrives and it has been tested well.

4TB Extreme Portables? New firmware was released for the 4TB Extreme Portables?

On a positive note, the drive comes with two 9-inch cables: USB-C-to-USB-C and USB-C-to-USB-A. That's better than an awkward converter dongle. The evaluation scheme for DAS units involves multiple workloads which are described in detail in the corresponding sections.Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: Up to three-meter drop protection and IP65 water and dust resistance 5 mean this durable drive can take a beating. Admin said:WD says that it is readying a firmware fix for a frightening SanDisk Extreme Portable SSD sudden failure issue, but it only mentions ups for 4TB users. Both drives support S.M.A.R.T passthrough. X6 does not indicate TRIM as an available feature. However, we were able to activate TRIM in Windows on NTFS volumes in both drives. Temperature monitoring and obtaining health status (in terms of TBW) are simple for both drives.

SanDisk Extreme PRO® Portable SSD V2 USB-C, USB 3.2 Gen 2x2 SanDisk Extreme PRO® Portable SSD V2 USB-C, USB 3.2 Gen 2x2

Whether you’re trekking through snowy mountains or filming in the middle of the desert, this drive won’t let you down. The Extreme Pro is IP55 water and dust resistant and rated to withstand a two-meter drop, though we feel that is a very conservative rating. At 85 grams, the Extreme Pro has a solid and weighted feel to it. That, along with the smooth rounded silicone-coated edges, conveys an apple-esque quality. There are plenty of external storage solutions out in the market, but very few of them will be as durable as the Extreme Pro Portable SSD. It’s got great transfer speeds to keep you going, plenty of storage, and comes in a variety of storage sizes. Also, that enclosure is made with an older Alpine Ridge TB3 controller, not titan ridge or newer like on some of these portable SSDs. So, its older tech.Because all portable SSD are a box with internal off the shelves NVME SSD .. I am 100% sure you will find the same Version of SANDISK Extreme Pro as a stand alone NVME ... The table below presents a comparative view of the specifications of the two portable SSDs covered in this review. Comparative Portable SSDs Configuration SanDisk provides a generous five-year warranty, which we have also seen on other Western Digital products such as the 2020 version of the My Passport SSD. (WD is SanDisk's parent company.) TB3 is more popular then USB 3.2 2x2 which is impossible to find in notebook and very rare in Desktops. Save time storing and transferring data with the forged aluminum chassis that also acts as a heatsink to deliver higher sustained speeds.