OzGrant 22 Posted May 18, 2016 Share Posted May 18, 2016 G'day, Have had no problems with 4GB SD's using SD.lib. But when I started to use 8GB SD's get all sorts of corrupted files. Not too sure if I have to reformat them (the 4GB just plug in and work) or I have a bad batch from China, or 8GB not supported by SD lib. Any ideas. Quote Link to post Share on other sites
PTB 27 Posted May 19, 2016 Share Posted May 19, 2016 I think there is some kind of limit. I found anything over 4gb got pretty funky. I tried a few different cards and they all misbehaved. I know the cards are good as they all work fine in my dslr camera. I'm not using sd.lib but rather petitfs. Same problem though. I found some 4gb cards on sale and bought a handful. Cheers Ptb OzGrant 1 Quote Link to post Share on other sites
greeeg 460 Posted May 19, 2016 Share Posted May 19, 2016 The problem is in the FAT implementation. 4Gb is the limit of 32 bit memory addresses. It's been alittle while since I played with FAT stuff. But I'm pretty sure that's what you're hitting here. OzGrant 1 Quote Link to post Share on other sites
OzGrant 22 Posted May 19, 2016 Author Share Posted May 19, 2016 Yup, that sounds like the answer. I tried a another brand SD with the same failure. Tks, Grant Quote Link to post Share on other sites
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