Fiio recommend FAT32 and NOT format the SDXC Micro card´s with 64 kb allocation size unit - it should be 32 kb or less. I now it´s possible to format the card directly in the X5, but I´ve used an third party software; 2Tware for it, and choosed 16 kb. Anyone have any suggestion about it?
And what are the playlist M3U -files in many of the album folders for? I use to delete them, and only save the FLAC´s, as the album cover should be tagged inside the songs. Should I leave the M3U?
When filling my Sandisk Ultra UHS-1 64 Gb with music, I´ll get a transfer speed of about 7,3 Mb/s with a USB2 SD card reader. Is there any possibilities it will get higher if using an USB3 reader instead?
/ Mikael Markstrom
When formatting you need to decide what is more important, speed or space. The larger the allocation unit size the faster access to the storage, but slightly less space. The smaller the allocation unit size the more space, but slower access speeds.
There have been many reports of issues when formatting with other software (especially with smaller allocation unit sizes) so I strongly suggest just formatting the mSD cards with the X5 itself to save a lot of headaches. When it was first released the X3 was a nightmare with formatting before Fiio included a format tool on the device. That is why the X5 comes with the (recommended) format tool as well.