![SanDisk Pen Drive 32GB Ultra USB 3.0 Blue SDCZ48-32g-u46b [SDCZ48-32g-u46b]](https://images-na.ssl-images-amazon.com/images/I/41dWlFcPa9L._AC_UL165_SR165,165_.jpg)
| Connectivity Technology | USB |
|---|---|
| Color | Black |
| Flash Memory Type | CompactFlash |
| Compatible Phone Models | Google Play |
| RAM | 256 GB |
| Memory Speed | 150 MB |
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Coverage for accidental damage including drops, spills, and broken parts, as well as breakdowns (plans vary) -
24/7 support when you need it. -
Quick, easy, and frustration-free claims.
Cover this product:
2-year Photo and Data Recovery Plan $3.99
3-year Photo and Data Recovery Plan $4.99
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Add to your order
- Coverage for accidental damage including drops, spills, and broken parts, as well as breakdowns (plans vary)
- 24/7 support when you need it.
- Quick, easy, and frustration-free claims.
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This Item  SanDisk 256GB Ultra Dual Drive m3.0 for Android Devices and Computers - microUSB, USB 3.0 - SDDD3-256G-G46, Black |  |  |  |  |  | |
| Price | $20.99 | $18.25 | $11.99 | $21.99 | $29.99 | $32.12 |
| Delivery | — | Get it as soon as Tuesday, May 28 | Get it as soon as Wednesday, May 29 | Get it as soon as Wednesday, May 29 | Get it as soon as Tuesday, May 28 | Get it as soon as Tuesday, May 28 |
| Customer Ratings | ||||||
| Portability | ||||||
| Storage Capacity | ||||||
| Easy to use | ||||||
| Value for money | ||||||
| Sold By | CalvinNHobbs | CWP Online | WINSTONE | Amazon.com | Amazon.com | CWP Online |
| memory capacity | 256 GB | 128 GB | 64 GB | 128 GB | 256 GB | 256 GB |
| read speed | 150 megabytes per second | 150 megabytes per second | — | — | 400 megabytes per second | 150 megabytes per second |
| hardware interface | usb3.0 | usb c | usb3.0 | usb3.2 gen 1 | usb3.2 gen 1 | usb3.0 |
Videos
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From the manufacturer
-
Easily transfer files from micro-USB devices
The SanDisk Ultra Dual Drive m3.0 is compatible with Android smartphones and tablets featuring OTG (On-the-Go) USB support (1).
-
Free up space
Quickly free up space on your Android smartphone or tablet so you can take more pictures and videos. Plug in the drive to easily move files off your device.
-
Automatic backup
Automatically back up photos and videos with the SanDisk Memory Zone app(2).
-
Quickly move files to your computer
High-speed USB 3.0 with 150MB/s(4) read speeds, say goodbye to emailing photos between devices.
-
2-in1 drive with retractable design
Sleek, retractable design offers both micro-USB and USB 3.0 connectors. The USB 3.0 connector is high-performance and backward-compatible with USB 2.0 ports.
-
Grab and go with keyring hole
Attach your drive to your keyring to keep it convenient and secure. Perfect for when you need to free up space when you’re out and about.
 Ultra Dual Drive m3.0 |  Ultra Dual Drive Luxe |  Ultra Dual Drive Go |  Ultra Dual Drive | |
|
Customer Reviews
|
31,036
|
16,459
|
23,763
|
103,313
|
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Price
| $20.99 | $84.99 | $36.99 | $21.99 |
|
Connector
| MicroUSB and USB Type-A | USB Type-C and USB Type-A | USB Type-C and USB Type-A | USB Type-C and USB Type-A |
|
Compatible Mobile Device
| Android w/ Micro-USB port | Android w/ USB Type-C port | Android w/ USB Type-C port | Android w/ USB Type-C port |
|
Compatible Computer Device
| PC/Mac with USB Type-A Port | PC/Mac w/ USB-C or USB-A Ports | PC/Mac w/ USB-C or USB-A Ports | PC/Mac w/ USB-C or USB-A Ports |
|
Design
| Retractable | All metal swivel design | Swivel design | Slider design |
|
Keyring Hole
| Yes | Yes | Yes | No |
Reviews with images
Read the fine print, **130MB/s READ speeds, write speeds are lower
If you noticed the picture of the packaging, there are two asterisks aka a catch. On the back of the packaging it reads: **Reads speeds from drive to computer up to 150MB/s. Write speeds lower and varies by capacity. USB 3.0 port required. Based on internal testing; performance may be lower depending upon host device.This isn't an issue for me as one cannot expect every device to perform as advertised. There will always be a limiting variable preventing you from ever reaching max advertised speeds. People need to understand this. Your old Galaxy S3 micro USB port (for example) will not push this drive to its limit. Onto the write/read speed test using H2testw.Using this drive on a USB 3.0 port and H2testw I was able to reach a peak of ~55MB/s write speeds at the start of the test. However that didn't last long and the drive steadily slowed down to 27.9MB/s 10min into the write test. At 1 hour, 25.7MB/s. When verifying the written data the drive peaked at 141MB/s. By the end of the test the drive stabilised at 103MB/s. I believe the drops are caused by thermal throttling of the drive, as it did it hot to the touch during testing.Please note, this isn't real world performance. H2testw is writing very large files, one at a time. Transferring photos will not reach these speeds as they are small files, the transfer speed will peak then drop back to zero before peaking at the next file. Transferring videos is similar to the test, as they are large files where the drive can ramp up to it's max possible speed. Again, depending on the host device and many other variables.H2testw is a free Windows utility that verifies the true capacity of the drive by writing "dummy files"; writing until the drive is full or "full". Then the utility reads them to verify the files, ideally the verify will complete without error. If it ends with an error it will show at what amount it ended. For example, if it ended at around 16GB but you purchased a 128GB; this simply means you received a counterfeit drive and should return the drive. If the test ended on an obscure number, the drive is faulty and needs replacing.The drive I received passed with a final capacity of ~117GB for the 128GB model. This is normal as some space is taken up by the MBR, the "library" of the drive where all your files locations are kept. This is how the host device knows what goes where, what is empty and what is not.There are two files already on the drive, a PDF manual and a APK file of SanDisks app for Android. I don't know why they bother including the APK as Android users would have to enable "Install from unknown sources" in their device settings. Just search for the app in the Play Store if enabling this makes your weary, although you can simply disable it right after you install the APK. But again, there's no point in the first place as the included app is probably outdated and will be updated by the Play Store soon after.
Top reviews from the United States
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Reviewed in the United States on June 12, 2022
This isn't an issue for me as one cannot expect every device to perform as advertised. There will always be a limiting variable preventing you from ever reaching max advertised speeds. People need to understand this. Your old Galaxy S3 micro USB port (for example) will not push this drive to its limit. Onto the write/read speed test using H2testw.
Using this drive on a USB 3.0 port and H2testw I was able to reach a peak of ~55MB/s write speeds at the start of the test. However that didn't last long and the drive steadily slowed down to 27.9MB/s 10min into the write test. At 1 hour, 25.7MB/s. When verifying the written data the drive peaked at 141MB/s. By the end of the test the drive stabilised at 103MB/s. I believe the drops are caused by thermal throttling of the drive, as it did it hot to the touch during testing.
Please note, this isn't real world performance. H2testw is writing very large files, one at a time. Transferring photos will not reach these speeds as they are small files, the transfer speed will peak then drop back to zero before peaking at the next file. Transferring videos is similar to the test, as they are large files where the drive can ramp up to it's max possible speed. Again, depending on the host device and many other variables.
H2testw is a free Windows utility that verifies the true capacity of the drive by writing "dummy files"; writing until the drive is full or "full". Then the utility reads them to verify the files, ideally the verify will complete without error. If it ends with an error it will show at what amount it ended. For example, if it ended at around 16GB but you purchased a 128GB; this simply means you received a counterfeit drive and should return the drive. If the test ended on an obscure number, the drive is faulty and needs replacing.
The drive I received passed with a final capacity of ~117GB for the 128GB model. This is normal as some space is taken up by the MBR, the "library" of the drive where all your files locations are kept. This is how the host device knows what goes where, what is empty and what is not.
There are two files already on the drive, a PDF manual and a APK file of SanDisks app for Android. I don't know why they bother including the APK as Android users would have to enable "Install from unknown sources" in their device settings. Just search for the app in the Play Store if enabling this makes your weary, although you can simply disable it right after you install the APK. But again, there's no point in the first place as the included app is probably outdated and will be updated by the Play Store soon after.
Size: 1 Count (Pack of 1)Verified Purchase
Read the fine print, **130MB/s READ speeds, write speeds are lower
Reviewed in the United States on June 12, 2022
If you noticed the picture of the packaging, there are two asterisks aka a catch. On the back of the packaging it reads: **Reads speeds from drive to computer up to 150MB/s. Write speeds lower and varies by capacity. USB 3.0 port required. Based on internal testing; performance may be lower depending upon host device.Reviewed in the United States on June 12, 2022
This isn't an issue for me as one cannot expect every device to perform as advertised. There will always be a limiting variable preventing you from ever reaching max advertised speeds. People need to understand this. Your old Galaxy S3 micro USB port (for example) will not push this drive to its limit. Onto the write/read speed test using H2testw.
Using this drive on a USB 3.0 port and H2testw I was able to reach a peak of ~55MB/s write speeds at the start of the test. However that didn't last long and the drive steadily slowed down to 27.9MB/s 10min into the write test. At 1 hour, 25.7MB/s. When verifying the written data the drive peaked at 141MB/s. By the end of the test the drive stabilised at 103MB/s. I believe the drops are caused by thermal throttling of the drive, as it did it hot to the touch during testing.
Please note, this isn't real world performance. H2testw is writing very large files, one at a time. Transferring photos will not reach these speeds as they are small files, the transfer speed will peak then drop back to zero before peaking at the next file. Transferring videos is similar to the test, as they are large files where the drive can ramp up to it's max possible speed. Again, depending on the host device and many other variables.
H2testw is a free Windows utility that verifies the true capacity of the drive by writing "dummy files"; writing until the drive is full or "full". Then the utility reads them to verify the files, ideally the verify will complete without error. If it ends with an error it will show at what amount it ended. For example, if it ended at around 16GB but you purchased a 128GB; this simply means you received a counterfeit drive and should return the drive. If the test ended on an obscure number, the drive is faulty and needs replacing.
The drive I received passed with a final capacity of ~117GB for the 128GB model. This is normal as some space is taken up by the MBR, the "library" of the drive where all your files locations are kept. This is how the host device knows what goes where, what is empty and what is not.
There are two files already on the drive, a PDF manual and a APK file of SanDisks app for Android. I don't know why they bother including the APK as Android users would have to enable "Install from unknown sources" in their device settings. Just search for the app in the Play Store if enabling this makes your weary, although you can simply disable it right after you install the APK. But again, there's no point in the first place as the included app is probably outdated and will be updated by the Play Store soon after.
Images in this review
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