Just adding my nickels worth.....if your planning on putting the SD card aw= ay in a drawer, holding archived information, then you better get it out at= least once a month, and plug it into something that will read it, and let = the controller refresh the charge. Otherwise you will end up with corrupte= d data or worse, nothing at all. Flash may be non-volatile but doesn't ret= ain the charge forever. Obviously the same goes for USB thumb drives and s= uch. -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of= IVP Sent: Thursday, February 12, 2015 12:42 PM To: Microcontroller discussion list - Public. Subject: Re: [PIC] SDHC read problem > Sandisk has this to say; Thanks. Things do seem to have settled down starting at 8GB. Which is fortunate bec= ause that looks to be entry level in retail stores now I'm also thinking of them for archive storage, rather than DVD, particularl= y for prority data like product projects, important photos and documents et= c Joe ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5646 / Virus Database: 4284/9102 - Release Date: 02/12/15 -- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/chang= e your membership options at http://mailman.mit.edu/mailman/listinfo/piclis= t ________________________________ PLEASE NOTE: The information contained in this electronic mail message is i= ntended only for the use of the designated recipient(s) named above. If the= reader of this message is not the intended recipient, you are hereby notif= ied that you have received this message in error and that any review, disse= mination, distribution, or copying of this message is strictly prohibited. = If you have received this communication in error, please notify the sender = by telephone or e-mail (as shown above) immediately and destroy any and all= copies of this message in your possession (whether hard copies or electron= ically stored copies). --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .