I am having a similar problem, please see my post, hopefully we will get to the bottom of this
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playlists copying to USB incomplete
Hello,
I'm having an issue with playlists incompletely copying over to my USB.
So say I have a playlist called 'BANGERS' with 50 tracks in it. I select 'export playlist to USB'. All the tracks copy over to the USB (and appear in 'all tracks'), but the 'BANGERS' playlist on the USB almost never has the right number of tracks. Sometimes it will say '0 tracks', sometimes 14, whatever — it seems to be random. I can drag the tracks over again and again and I get an 'exporting' progress bar, but once it's done I either still have the incorrect number of tracks in the USB playlist, or I get a few more (i.e. it goes from 14 to 25), or very occasionally I end up with the full list.
It's been happening for ages but seems to be getting worse. I have tried reformatting USBs, using different USBs etc but nothing seems to help.
Any ideas?
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I'm going to start by guessing it's a low quality or problematic USB drive, which brands / models have you tried?
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I have the same problem lot's of the usb's after a while have reading problems. And i have to change them about 2/3 months. I always do 2 USB for back up. But if i don't check always i will have an uncomplect playlist. What USB do you recomand. The music collection is on external hard drive is that ok?
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External hard drive is fine for your collection - I keep mine on an external SSD.
See, the problem with USB drives is everyone markets their drives as "USB3.1" or "USB3.0 speed", which doesn't mean ANYTHING. Typically that marketing is used to describe the maximum theoretical performance of their USB drive, and as long as they meet a minimum speed (basically any speed faster than the theoretical maximum of USB2) they can claim "USB3 speeds." Most drives offer decent read speeds, but it's the write speeds where drives can fall flat, especially when it comes to writing many small files (as is in the case of rekordbox writing the database of waveform / cue point data during the export).
I tested a variety of USB drives available on the market, and found the biggest difference between them is not the memory chips themselves, but rather the control chipset that manages the data flow to and from the memory on the drive. The best performing drives use a solid-state drive management chipset. They're more expensive than standard USB drives, but will offer a much higher performance in terms of the write speeds.
As I've posted in a couple of threads recently...
Personally, I use the SanDisk Extreme Pro or Corsair Flash Voyager GTX USB drives as both of them have SSD controller chipsets.
If you're going to that price point, you may also want to consider the Glyph ATOM, and the Samsung T3, two reasonably small but ridiculously fast mSATA-based SSD drives.
This webpage has some great information on SSDs / USBs and why you should choose which one for which purpose.
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