In the test: SanDisk Ultra 128 GB USB stick with USB-C and USB-A connector

Once all the plugs have been inserted, the small USB stick can be transported safely.

After being the owner of the new MacBook Pro 2017 for a short time, the switch to USB-C compatible accessories is now of course on the agenda. Since I needed a USB stick again, I researched which USB 3 sticks are available with a USB-C connector that can be connected directly to the MacBook or USB-A adapter without a USB-C to USB-A adapter MacBook Pro can use.

After all, I'm on Amazon at Amazon SanDisk Ultra USB stick with 128 GB struck, which has a built-in slider and thus even covers USB-A and USB-C ports. If you have the slider in the middle position, both plugs are well protected inside the stick. The stick also looks good from a purely visual point of view, but the customer ratings are rather mixed. Some customers give the stick very good reviews because it offers high speeds, while others give it bad reviews because it would get too hot.

Small and fast: the SanDisk Ultra USB stick is astonishingly small and still contains 128 GB as well as USB-C and USB-A plugs inside (Photo: Sir Apfelot).

Small and fast: the SanDisk Ultra USB stick is astonishingly small and still contains 128 GB as well as USB-C and USB-A plugs inside (Photo: Sir Apfelot).

A test brings clarity

Due to the good experience I have had with SanDisk SD cards so far, I have not been put off by the negative reviews and just ordered the 128 GB model, which I was able to take a closer look at today. I describe my results to you in this review.

USB stick benchmarking with AJA system test: The SanDisk Ultra 128 GB delivers good results in writing and reading.

USB stick benchmarking with AJA system test: The SanDisk Ultra 128 GB delivers good results in writing and reading.

Speeds up to 150 MB / s (read)

In the product description, SanDisk advertises the stick with a read speed of up to 150 MB per second. In practice this is definitely a value for me that can be understood. My reading speed is an average of 145 MB / sec, only a few MB below the advertised value. I tested the data throughput with the Hard drive benchmarking tool called AJA System Test, with which you can also check all other storage media.

As always, it looks a little different when writing data. Here, at around 70 MB / s, I am still quite high compared to other devices. I don't have the speed with some other USB sticks (which also support USB 3). Only my Transcend Extreme Flash USB Stick can top the values ​​and brings about 185 MB / s when reading and about 75 MB / s when writing. But it doesn't have a USB-C connector that fits directly into the MacBook.

If you connect the USB stick to the MacBook via the USB-C to USB adapter, it achieves roughly the same results. If you connect the USB stick to the MacBook via the USB-C to USB adapter, it achieves about the same speeds as with direct connection via USB-C. speeds.

If you connect the USB stick to the MacBook via the USB-C to USB adapter, it reaches about the same speeds as with a direct connection via USB-C.

Same values ​​via USB-C and USB-A

To test whether the SanDisk Ultra also delivers its good values ​​via the USB-A connector, I have it with a corresponding one USB-C to USB adapter from Anker connected and started the tests again. The results were very similar, so I would say there is no noticeable difference in speed here.

How good is the slide switch?

I think the idea that the two USB plugs can be retracted and extended using a slide switch is quite successful. As a result, the plugs are well protected during transport and can still be extended with a single movement. At the end of the sliding process, the slider engages, which prevents you from accidentally pushing the plug back into the stick when inserting the stick. The lock can be released when you pull it back by lightly pressing the slide.

If you connect the SanDisk Ultra Stick to the MacBook Pro via the USB-C port, you still have enough space for the charging plug, which can be plugged into the second USB-C port.

If you connect the SanDisk Ultra Stick to the MacBook Pro via the USB-C port, you still have enough space for the charging plug, which can be plugged into the second USB-C port.

Positive: The stick only occupies one USB-C port on the MacBook Pro

I find the small width to be an advantage, as it leaves enough space on the MacBook Pro so that the USB-C charging plug can easily be plugged into the adjacent port. However, you have to make sure that you turn the slide switch away from the other connector, as this side needs a little more space. However, by using USB-C this is not a problem, as you can insert the connector in any "direction".

Criticism from other users: Strong heat development

If you read the Amazon reviews on this USB stick, you will often come across the negative entries that the stick would get unnaturally hot and burn your fingers or the stick will sooner or later because of the strong ones Heat development would give up the ghost.

To investigate this phenomenon, I connected it to my MacBook Pro via USB-C and tormented it with several gigabytes of data for several minutes. In fact, it does get warm after a few minutes, but I was only able to measure a temperature of 47 degrees Celsius on one corner of the stick with my infrared thermometer. Although this is not a particularly high value, it appears significantly "hotter" when you touch the stick, as it has a small aluminum sheet which, of course, conducts the heat well and transfers it to the fingers.

The high temperature of 47 ° C only occurs when the stick is connected via the USB-C connector. However, this warming does not pose a risk.

The high temperature of 47 ° C only occurs when the stick is connected via the USB-C connector. However, this warming does not pose a risk.

In practice, however, 47 degrees Celsius is not a problem for microchips. Even sensitive processor models only reach a critical temperature of 55 degrees. With most Macs, even 80 degrees are no problem. For this reason I think that the measured temperature is not a real risk. However, it is unusual for a USB stick to produce heat. I haven't seen this in any other model so far. To check whether it is perhaps only connected to the USB-C port, I also connected the stick with the anchor adapter to my MacBook Pro via the normal USB plug, but here too the temperature rises slightly after a few minutes to 36 to 38 ° C.

Update 18.8.2017: In order to track down the heat development, I have the current consumption with me my new USB-C Multi-Tester measured. Unfortunately there is no difference between USB-A and USB 3.1 Type-C connections. Both draw 0,12 amps at the usual 5 volts.

 

Summary

The USB stick from SanDisk with 128 GB offers plenty of space for data that you would like to have with you on the go. I think the solution with the slide-out plugs for USB-A and USB-C is very successful and the small size ensures that only one USB-C port is actually used on the MacBook Pro. I was positively surprised by the high reading speed, which corresponds to the SanDisk advertising promise.

Overall, there is nothing to complain about about the stick, so I can recommend it without hesitation.

15,00 EUR
SanDisk Ultra 128 GB USB-C stick
This USB stick from SanDisk supports the USB 3.1 standard and has an integrated USB-A and USB-C connector, so that it can be plugged into older Macs as well as newer MacBook and MacBook Pro models without an adapter. The read / write speeds are around 70 MB / s and 145 MB / s.
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