Here's a funny anecdote: I review an amplifier here and point out there's a hum in the right channel. Everybody says I'm nuts and need better power filtering. Better tubes. Imagining things. Maybe I'm crazy. Lo and behold, the amp designer confirms there's a hum! The pitchforks quietly disappear. But here we are again. The confirmation bias precludes a reasonable discussion. The user must be a moron. Throwing out baseless accusations and bashing a much-loved product like a troll! How dare he...
Here's the problem: I've tried my AK240 with Sandisk 128gb cards. Samsung 128gb cards. PNY 128gb. Purchased from Amazon. 64gb cards. 8gb cards. Formatted for FAT32. Formatted for ExFat. Formatted with the sdcard.org formatter. Verified performance up to spec. Done everything I can to authenticate they're real. Populated them directly. Populated them via Android Connect on Mac. Populated them via the media interface on Windows. Doesn't matter, the stupid thing still locks up. Tried factory resets. Tried on-device formats. I've searched extensively for any sort of advice on what I could be doing wrong, and I've tried every solution offered up. Oh, and, yes, I've checked it with H2TESTW. Please take your smug assumptions elsewhere.
All I've got is my experience an anecdotes, but with all due respect I find the fanboy conclusion that it's user error to be offensive.
I contacted iRiver support. They suggested I try exchanging the player with the retailer (an authorized retailer, but I find it questionable that the manufacturer does not seem to care particularly about supporting their hard/software directly) but thus far have offered little additional guidance or support otherwise. My player reliably locks up when playing ALAC via microSD card, but has no problems with internal storage. There is either a hardware problem with my particular player or something is not right with some aspect of the software, but blaming me, the user of this $2500 piece of junk, is getting old. I am not trying to pluralize my anecdote, but the level of support on this luxury DAP is abysmal. The experience I, personally, have had, is embarrassing. My experience thus far is that there is not a company backing these devices at the level their price tag demands.
I like the AK240. I think it sounds good but one of the big features (microSD support) just plain does not work for me. If this was a $349 product, maybe I'd chalk it up to buying crap, but anything less than perfection at the $2499 price point is absurd.