A flash drive for a USB-C phone or laptop may not work with older computers that use USB-A. The Lexar D40E options in this guide include both connector types, so the main choice is how much storage you need and whether the listed speed and features suit your devices.
Below, we compare the 64GB and 128GB versions, explain their shared features, and outline compatibility checks that can prevent surprises. The right capacity depends on the files you plan to carry, while USB-C connector shape alone does not guarantee that every device supports the same features.
Pros
- USB-C and USB-A connectors
- Cap-free swivel design
- No software installation required
- Three-year limited warranty
Cons
- Skip if you need more than 64GB
- Advertised speed varies by device and usage conditions
Pros
- USB-A and USB-C connectors
- No removable cap
- Lightweight metal housing
- Three-year limited warranty
Cons
- Who should skip it: buyers needing specified speeds above 100MB/s
The Best USB-C Flash Drives by Use Case
Best for Everyday File Transfers: Lexar D40E 64GB Dual USB 3.2 Gen 1 Type-C Jump
The Lexar D40E 64GB Dual USB 3.2 Gen 1 Type-C Jump suits people who want one drive for transferring files between USB-C and traditional USB-A devices. Its 64GB capacity gives you room for documents, photos, and other portable files, though the space available for your own data may differ from the advertised capacity because manufacturers and operating systems calculate storage differently. The listing specifies transfer speeds up to 100MB/s, based on internal testing, and notes that actual performance varies by host device, interface, and use.
Reasons to buy:
- USB Type-C and USB Type-A connectors support moving files between devices with either port type.
- The listing specifies up to 100MB/s transfer speeds, with performance dependent on the host and interface.
- A 360-degree swivel design switches between connectors without a separate cap to keep track of.
Reasons to avoid:
- 64GB may be limiting if you intend to store large video collections or many high-resolution files.
- The listing does not provide separate read and write speeds or guarantee that every connected device will reach the stated maximum.
Skip it if you need more than 64GB on one drive or need a specific, guaranteed transfer rate for a particular device.
Best for More Portable Storage: Lexar D40E 128GB Dual USB 3.2 Gen 1 Type-C Jump
The Lexar D40E 128GB Dual USB 3.2 Gen 1 Type-C Jump is the higher-capacity choice in this pair. Its 128GB capacity can suit people who keep more work files, photos, or offline media with them and still want both USB-C and USB-A connectors. The product listing gives the same up-to-100MB/s speed claim as the 64GB model, but does not claim that the larger version transfers files faster.
Reasons to buy:
- Twice the listed capacity of the 64GB option, useful when a smaller drive would fill quickly.
- Dual USB-C and USB-A connectors allow use with compatible devices that have either port.
- The listing specifies a metal enclosure, a 360-degree swivel design, and a three-year limited warranty.
Reasons to avoid:
Reasons to avoid:
- Extra capacity may go unused if you mainly carry a few documents or small files.
- As with the 64GB model, the listed maximum speed is not a guaranteed result for every device or file transfer.
Skip it if you want the smaller capacity and have no need to keep more files on one drive.
Best for a Smaller File Library: Lexar D40E 64GB Dual USB 3.2 Gen 1 Type-C Jump
The Lexar D40E 64GB Dual USB 3.2 Gen 1 Type-C Jump also makes sense when your priority is carrying a modest collection of files rather than choosing the largest capacity. Its dual connectors can help when you move documents from a USB-C phone or tablet to a computer with USB-A, provided the device supports USB storage. It shares the D40E family’s listed metal enclosure, plug-and-play operation, and swivel connector cover.
Reasons to buy:
- Its 64GB capacity may be a practical fit for a focused set of documents, photos, or presentations.
- Both connector types are built into the drive, reducing the need to carry a separate adapter for those ports.
- The listing says no software installation is required for plug-and-play use.
Reasons to avoid:
- It offers less listed capacity than the 128GB version, so larger libraries may need another storage option.
- Plug-and-play wording does not establish compatibility with every phone, tablet, operating system, or file system.
Skip it if you regularly carry large media folders or prefer extra room for future files.
Best for a Larger File Library: Lexar D40E 128GB Dual USB 3.2 Gen 1 Type-C Jump
The Lexar D40E 128GB Dual USB 3.2 Gen 1 Type-C Jump fits a larger portable collection without changing connector options from the 64GB model. It may suit someone who wants to carry more files between a USB-C device and a USB-A computer, rather than relying on cloud access or another storage device. The greater capacity is its clear distinction; the published product information does not identify a different speed rating or a separate feature set.
Reasons to buy:
- 128GB provides more listed storage for people who carry a broader mix of files.
- The dual-connector design covers compatible USB-C and USB-A ports in one compact drive.
- The listing specifies 256-bit AES encryption through an advanced security software solution and a three-year limited warranty.
Reasons to avoid:
Reasons to avoid:
- The listing does not explain the encryption software’s setup, supported operating systems, or any recovery process, so verify those details before relying on it.
- Higher capacity does not mean higher transfer speed; the listing gives the same up-to-100MB/s claim for both options.
Skip it if you rarely store files locally or need a published read-and-write speed for a specific workflow.
How to Choose the Best USB-C Flash Drive
Check connector type and device support
USB-C describes the connector shape, not a guarantee that every phone, tablet, or computer supports the same storage functions or transfer rates. Both D40E options list USB Type-C and USB Type-A connectors, which can help when you move files between newer USB-C devices and older computers with USB-A ports. Before buying, check your device’s specifications for USB storage or OTG support, then confirm that the drive’s connector can physically fit alongside cases or nearby ports.
For phones and tablets, also check whether the operating system can browse files on an external drive and whether your file-management app supports the formats you need. A listing’s broad compatibility statement is not a substitute for confirming support on your exact device. If the drive will connect to several devices, verify each one rather than assuming that one successful connection means universal compatibility.
Choose capacity for the files you carry
The two choices here are 64GB and 128GB. The smaller option may be enough for a limited set of documents and photos; the 128GB model gives more listed room for larger collections. Neither capacity is automatically the better choice: consider the types and approximate size of your files, and leave room for future additions.
Advertised capacity and usable space are not always identical, since formatting and how storage is measured affect the amount shown on a device. If you plan to keep a single large file on the drive, check the file system and file-size limits supported by the computers or mobile devices you will use. The published product information does not specify a file system, so verify it before relying on the drive for a particular workflow.
Interpret speed claims carefully
The D40E listings state transfer speeds up to 100MB/s and attribute that figure to internal testing. They also say results may vary with the host device, interface, and usage conditions. This is a maximum claim, not a promise that every transfer will run at that rate. The published details do not separate read and write speeds, so they cannot show how quickly the drive will save a large video file.
Check the drive’s speed information against the device you plan to use, particularly if frequent large transfers matter. A compatible connector does not, by itself, establish that a phone or computer can use the drive at its maximum listed speed. For occasional document transfers, capacity and compatibility may matter more than a top-line speed claim.
Consider the design, security, and warranty
Both options list a metal enclosure, a 360-degree swivel design, a weight of 26g, and dimensions of 70.4 by 16.9 by 11.7mm. Those details can help you judge whether the drive’s shape and size suit your bag or device setup. The product information specifies an operating temperature range of 32°F to 122°F, but it does not provide a water-resistance rating or guarantee against physical damage.
Both listings also mention 256-bit AES encryption through an advanced security software solution and a three-year limited warranty. Check the software’s supported devices and setup instructions if encryption is important to your work. Review the warranty terms for coverage and claim requirements rather than assuming the warranty covers every type of damage or data loss.
How We Compared
This comparison uses the published product listings, including stated capacities, connector types, speed claims, dimensions, materials, security information, and warranty details. The two products share the same described design and feature set, so recommendations focus on the documented capacity difference and on the needs each capacity may suit. No customer review details were supplied, so this guide does not draw conclusions from buyer feedback.
Frequently Asked Questions
Will either Lexar D40E work with any USB-C phone?
Not necessarily. The listings describe compatibility with USB-C phones, tablets, laptops, Macs, and USB-A devices, but a device must support external USB storage. Check your phone’s specifications and file-management support before buying, especially if you plan to use the drive with a specific app or operating system.
What is the difference between the 64GB and 128GB versions?
The listed capacity is the main documented difference: one holds 64GB and the other 128GB. Both listings specify USB-C and USB-A connectors, a 360-degree swivel design, up-to-100MB/s transfer speeds, a metal enclosure, encryption software, and a three-year limited warranty. The published information does not establish that one version is faster.
Can I use the drive with a computer that has USB-A ports?
Both D40E listings specify USB Type-A and USB Type-C connectors. That gives you a connector for compatible USB-A computers, but the computer’s operating system and file system still need to support the drive. Check the ports and storage requirements on each device you plan to use.
Does the up-to-100MB/s claim guarantee that transfer speed?
No. The listing describes up to 100MB/s based on internal testing and says performance can vary by host device, interface, and use. It does not provide separate read and write speeds or a guaranteed speed for a particular phone or computer.
Do the listings say the drive needs software?
The listings describe plug-and-play use without software installation for basic use, and separately mention an advanced security software solution for 256-bit AES encryption. They do not provide setup details or a list of supported operating systems for that security feature. Confirm those details if encryption is a deciding factor.
Which capacity should I choose for photos and videos?
Choose based on the size of the collection you intend to carry. The 64GB option may suit a smaller selection, while 128GB gives more listed space for a larger library. Check the actual file sizes and leave room for additions; the product information does not specify how many photos or videos either drive can hold.
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