Release date: Q3 2014.

Release date: Q3 2012.

Real World Speed
Performance profile from 3,091 user samples
3,077 User Benchmarks
Best Bench: 31% 1GB free, PID 5583 @USB 3.0
Worst Bench: 10% 8GB free, PID 5583 @USB 3.0
Poor: 10% Great: 31%
SPEED RANK: 205th / 639
14 User Benchmarks
Best Bench: 38% 9GB free, PID 1064 @USB 3.0
Worst Bench: 11% 1GB free, PID 1064 @USB 2.1
Poor: 11% Great: 38%
SPEED RANK: 187th / 639
Effective Speed
Effective USB Speed
20.6 % 22 % Slightly faster effective speed.
Peak Sequential Read Speed
135 MB/s 198 MB/s Much faster peak read speed.
Peak Sequential Write Speed
42.4 MB/s 45 MB/s Slightly faster peak write speed.
4K Read
Peak 4K Random Read Speed
6.9 MB/s +3% 6.7 MB/s
4K Write
Peak 4K Random Write Speed
2.6 MB/s Hugely faster peak random write.
0.31 MB/s
Value For Money
22.2 % Hugely better value.
7.71 %
User Rating
UBM User Rating
63 % Slightly more popular.
56 %
Price (score)
$8 Much cheaper.
50 Months Much more recent.
74 Months
16GB 16GB

The 16GB SanDisk Ultra Fit USB 3.0 is a remarkable flash drive. As well as packing a tiny form factor, the Ultra fit also boasts an impressive peak performance profile with maximum sequential read/writes of 129/46 MBps and 4K read/writes of 6.08/1.51 MBps. The Ultra Fit is actually only bested by three other 16GB models (Sandisk Extreme, Lexar P10, Lexar Triton) all of which cost between from 60-230% more. In terms of outright performance there are better alternatives but in terms of value for money the Ultra Fit is hard to beat. The superbly low price coupled with an amazing form factor which is barely larger than a USB socket make it easy to recommend the 16GB Ultra fit as the best small form factor flash drive on the market. The only thing to watch with the Ultra Fit are its sustained speeds which are significantly lower than peak. [Oct '14 USBFlashPro]


We like this drive, it has the highest sequential read speed we have seen to date and the remainder of its performance profile is also respectable. At 198 MB/s the read speed is almost double the speed stated on the drives box, and 33% higher than the speed quoted on Lacies website, an unusual result that needs verification (comments from owners welcome). In terms of form factor we are very disappointed with the oversized orange cap and can't realistically see anyone leaving it attached to the drive. Without the cap this drive is superbly strong, ultra compact and performs respectably, we like it a lot. The only problems we do have with the Lacie RuggedKey are its price which is simply not competitive at this time and we would have liked to have seen higher random 4k speeds for this top end drive. [Aug '12 USBFlashPro]


USB Flash Drive Rankings (Price vs Performance) October 2018 USB Rankings.

We highlight the best USB flash drive in terms of balanced performance and value for money using current prices, sequential read, sequential write , 4k read and 4k write speed. The speeds are combined to form a single effective speed which measures performance for tasks such as copying photos, music and videos. Effective speed is adjusted by current price and capacity to yield value for money. Finally thousands of individual user ratings are used to validate our benchmark figures. [USBFlashPro]


Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
How Fast Is Your USB? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

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How it works

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  • - CPU tests include: integer, floating and string.
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