SanDisk8TB Extreme Portable SSD - Up to 1050MB/s, USB-C, USB 3.2 Gen 2, IP65 Water and Dust Resistance, Updated Firmware - External Solid State Drive - SDSSDE61-8T00-G25

I purchased the SanDisk 2TB Extreme Portable SSD for my 2020 Tesla Model 3, and it works great! Setup was quick and easy, and it has plenty of storage for dashcam and Sentry Mode recordings. Compact, reliable, and super fast—definitely worth it!

My old PC had the regular non SSD 4TB hard drive. It was a top of the line unit when I bought it, made for gaming, extremely fast refresh rate, etc... I would have had to replace the motherboard when Windows 10 will no longer be supported. My wife uses this computer and wanted a new one. I knew that I would get a new PC with a SSD (which is what my laptop has) and I knew that the SSD has no lag time from startup to opening up a webpage. So I wanted an external hard drive that would match the speed of the new PC and this little 4TB SSD external hard drive did not disappoint. It took about 7 hours to transfer my data from my old PC to the SSD external drive (previously it took about 24 hours). When I transferred my data to the new PC with this SSD it only took about an hour and a half. That was well over 1TB. Wow. I am impressed with the transfer speed. It works flawlessly, makes absolutely no noise, writes at lightning speed, takes up very little space, and is just awesome overall. I recommend this drive to anyone that has a lot of data to transfer and very little time to do it.

I personally really like this SSD. It’s small and portable, easy to carry around, and the design looks sleek. The speed is excellent, making file transfers quick and smooth.I also got a protective case for it, which can be clipped to a backpack or purse — making it always visible and easy to access. Just a small tip: if you’re in a place with lots of pickpockets, it’s safer to keep it inside the bag rather than hanging outside.For me, it’s absolutely worth it — a reliable drive with plenty of storage that I can count on every day.

I've owned several of these SanDisk 1TB Extreme Portable SSDs, and the only reason I keep buying more is because I let people borrow them—and they never come back. That’s how much people love using them.What I love:Blazing Fast Speeds: With up to 1050MB/s read and 1000MB/s write speeds, file transfers are lightning quick. Perfect for large media files, backups, or running apps directly from the drive.Compact & Durable: The small form factor makes it ultra-portable, and the IP65 rating means it’s water- and dust-resistant—great for travel or field work.USB-C & USB 3.2 Gen 2: Modern connectivity that works seamlessly with my laptop and other devices.Reliable Firmware: The updated firmware has kept performance consistent and stable across all the units I’ve owned.Bottom line: This drive is fast, rugged, and incredibly convenient. Just be warned—if you lend it out, you might not get it back!

I’ve been using this 4TB Extreme Portable SSD for a few weeks now, and it’s been flawless. Transfer speeds are very close to the advertised 1050MB/s — I moved a large video project (over 300GB) in under 10 minutes, which is a huge upgrade from my old external HDD.The size is perfect for travel — it fits in the palm of my hand, lightweight but sturdy, and the rubberized exterior makes it easy to grip. I like the carabiner loop too, since I can clip it to my bag for quick access.The IP65 rating gives me peace of mind. I’ve already taken it out on location shoots where it was dusty and slightly rainy, and it kept performing without a hiccup. The updated firmware seems to have solved the issues people mentioned in older reviews.If you need a reliable, high-speed drive for photo, video, or just large backups, this one is worth the investment. Expensive, yes — but rock solid so far.

This SSD uses TLC NAND memory, which is a good feature. However, it seems it lacks an internal DRAM cache, which is not very good. I'm not 100% sure tbh about the absence of the DRAM cache, it's difficult to find detailed specs for this drive, but from what I googled, it seems it doesn't have a DRAM cache.The main issue for me—and the reason I deducted one star—is that once the drive is partially filled, the write speed for large files drops to approximately 438 MB/s.When the disk is empty, CrystalDiskMark reports sequential read and write speeds of around 1 GB/s. However, CrystalDiskMark is not a good test for real-world performance, at all (I’ll explain this in more detail below). In actual use, writing large files to an empty disk achieves speeds of about 736 MB/s. As mentioned earlier, the write speed decreases noticeably as the drive fills up. While this behavior is somewhat normal for SSDs, the speed drop can be much less pronounced in more expensive or higher-quality SSDs.That said, reading large files remains consistently fast with this drive, maintaining speeds of around 1 GB/s regardless of how full the disk is.Recently, I realized I didn’t know as much about SSDs as I thought and had been relying too heavily on CrystalDiskMark for testing. Since then, I’ve educated myself on SSDs, learned how to test them properly, and even acquired several different SSDs for testing and experimentation.If you’re interested in learning more about SSDs and proper testing methods, feel free to read on.A lot of people use CrystalDiskMark for testing storage speed. You should know that using CrystalDiskMark is not a good way to test speed. It's a pretty limited test. It can't emulate the real-life use case of copying large files. Even if you choose 64 Gbyte test file size, CrystalDiskMark will simply create a 64Gb test file, but then it will only write or read a small part of that file.So if you want to copy large files with high speed, you need to test it by... no surprise here... by copying large files. Although I think it can be a surprize for a lot of people who rely on CrystalDiskMark. Make sure you will copy from another very fast SSDs, so that the read performance of that other SSD will not be the real bottle neck. I used my fastest internally isntalled NVME SSD to copy large files from (TLC NAND memory, SLC cache, DRAM cache, up to 7 Gbyte/s read & write speeds).Storage drives have different kinds of caches. SSD drives can have an SLC cache (SLC = Single-Level Cell, the fastest and most expensive type of NAND memory) and/or a DRAM cache (for example, an SSD can have 1Gb DDR4 internal cache).Consumer SSDs usually use QLC (Quad-level cell, stores 4 bits per cell, one of the slowest and less reliable types on NAND memory. Used in cheaper SSDs) or TLC (Triple-level cell, stores 3 bits per cell, faster and more reliable than QLC. Used in more expensive SSDs). You can see how an SLC & DRAM caches come into play, for example, here: https://www.techpowerup.com/review/silicon-power-xs70-1-tb/6.htmlMore expensive SSDs also have an internal DRAM cache, which is used before the SLC cache (if present) is used. In 2024-2025 DRAM cache usually uses DDR4 memory. DDR4 cache is a few times faster than TLC for sequential reads & writes and has about a 1000x lower latency than TLC (nanoseconds vs microseconds).So when choosing an SSD, if you want high sustained write-speeds, you need to make sure the drive has the following characteristics (which often can be found in the SSD database on this website: https://www.techpowerup.com/ssd-specs/silicon-power-xs70-1-tb.d707 ):1) TLC type of NAND memory (faster than QLC)2) SLC Cache and the larger, the better (good drives nowadays have 100+ Gbytes of an SLC cache). You can see how an SLC & DRAM caches come into play, for example, here: https://www.techpowerup.com/review/silicon-power-xs70-1-tb/6.html3) DRAM Cache and the larger, the better (1Gb+ DRAM cache is a good size)I'm sorry for this long text, I just hope I can help some people to understand SSDs and how to test them better and make better choices when buying SSDs and SSD adapters.