This is the third 128GB USB memory stick that I have purchased in the last few weeks.
I need one to transfer video from a full 128GB MicroSD card to allow viewing on TVs.
The exFat formatted capacity of the MicroSD card is 116GB. This is partly because of the industry wide marketing fudge of measuring capacity as Decimal bytes rather than actual Binary bytes. However, it is still of lower storage capacity than claimed: 124.75GB when measured as specified by the manufacturer. It is what it is and until we all stop accepting this BS it will continue.
However, I knew this, so I am trying to find a USB stick that will all allow all the recorded footage to be transferred to a USB stick as quickly as possible. So I need a USB stick with a minimum binary storage capacity of 116GB and fast sequential write speed.
Patriot 128GB Supersonic Rage 2: Available storage decimal capacity 123.9GB, actual binary 115.4GB
Claimed write speed: Up to 200MB/s - Actually 90MB/s (due to a descriptive error in specification by seller).
So insufficient size for my needs but fast, though half as fast as claimed (this error has still not been rectified by the seller).
Lexar 128GB S75 Jumpdrive: Available storage decimal capacity (not recorded), actual binary 117GB.
Claimed write speed: up to 60MB/s - Actually 14.5MB/s (read speed was way above spec. at 208MB/s).
So sufficient size but unacceptably, woefully slow for my needs.
SanDisk 128GB Extreme Go: Available storage decimal capacity 126.5GB, actual binary 117GB.
Claimed write speed: up to 150MB/s - Actually 38MB/s (slower than a SanDisk 64Gb Ultra at 42MB/s).
So sufficient size, but way below spec. and at a premium over the slightly faster Ultra.
I can't be the only one frustrated by this (deliberate?) obfuscation of performance specification. How is one supposed to buy anything if the description and/or specifications are theoretical when realistically they are fantasy!
Make a stand! Test your digital storage devices and if they don't meet the claimed specification just keep sending them back until this BS stops.
All tests conducted with CrystalDiskMark on Win7. Drives tested as delivered. Reformatting to NTFS, exFAT or FAT32 made little difference.
| Brand | SanDisk |
|---|---|
| Product Dimensions | 1.14 x 2.13 x 7.09 cm; 18.14 Grams |
| Item model number | SDCZ800-064G-G46 |
| Manufacturer | SanDisk |
| Series | SanDisk Extreme Go USB 3.1 Flash Drive |
| Color | Black |
| Form Factor | Dia. |
| RAM Size | 64 GB |
| Hard Drive Size | 64 GB |
| Hard Disk Description | HDD |
| Wattage | 64 |
| Are Batteries Included | No |
| Item Weight | 18.1 g |
