<p>I have a Monoprice Select Mini v2 and it came with a 256 MB SD card. I have a bunch of 16 GB cards. I have made sure that the new SD card has a FAT32 filesystem. I copy the gcode file onto this card and when I put it in the printer, it can't find any files!</p>

<p>And yes, the file is at the root level of the filesystem and it uses the proper naming convention. The file works on the old card.</p>

<p>Since the old card still works, this isn't an emergency, but I want to have a backup and I don't have any other cards that small.</p>

[{'answer_id': 5307, 'author': 'Fernando Baltazar', 'author_id': 4454, 'author_profile': 'https://3dprinting.stackexchange.com/users/4454', 'pm_score': 0, 'selected': False, 'text': "<p>The maximum size is 32 GB, however using microSD has a little disadvantage:</p>\n<ol>\n<li><p>The microSD adapter and Micro memory are wrong assembled and the chip are unable to be read.</p>\n<p>Solution: stick with a tape adhesive to keep Micro memory and SD adapter well aligned</p>\n</li>\n<li><p>The SD adapter can't be read on the 3D printer</p>\n<p>Solution: Add an extra tape adhesive over the SD adapter just like sticker, to make tight the assembly inside the reader.</p>\n</li>\n</ol>\n<p>Clean the contacts of the SD adapter, normally has the same issue like nintendo cartridge.</p>\n<p>I´m planning to get a bunch of SD cards instead microSD's, none of SD 8 GB and 16 GB are failing due wrong contact assembly.</p>\n"}, {'answer_id': 5311, 'author': 'Tom van der Zanden', 'author_id': 26, 'author_profile': 'https://3dprinting.stackexchange.com/users/26', 'pm_score': 4, 'selected': True, 'text': '<p>Unfortunately, the answer isn\'t as simple as that a specific size of SD card works and another size doesn\'t. The <a href="https://github.com/MarlinFirmware/Marlin/wiki/SD-cards" rel="nofollow noreferrer">Marlin firmware wiki</a> mentions:</p>\n\n<blockquote>\n  <p>The SD- or MMC- Card must be formatted as FAT and must have a MMC interface. This is more likely with cards &lt;= 2&nbsp;GB.</p>\n</blockquote>\n\n<p>MMC is the predecessor of SD. SD cards are <em>not</em> necessarily fully backwards compatible with MMC. Apparently, Marlin uses some features specific to MMC, so your card should support it.</p>\n\n<p>The SD card support in Marlin is based on the <a href="https://www.arduino.cc/en/Reference/SD" rel="nofollow noreferrer">Arduino SD Card Library</a>, which further mentions:</p>\n\n<blockquote>\n  <p>The library supports FAT16 and FAT32 file systems on standard SD cards and SDHC cards.</p>\n</blockquote>\n\n<p>Based on this:</p>\n\n<ul>\n<li><p>Cards should be formatted FAT16 or FAT32.</p></li>\n<li><p>Cards bigger than 32&nbsp;GB definitely won\'t work (not SD or SDHC).</p></li>\n<li><p>Cards at most 2&nbsp;GB will probably work.</p></li>\n<li><p>Cards between 2&nbsp;GB and 32&nbsp;GB <em>might</em> work, depending on the specifics of the card.</p></li>\n</ul>\n'}, {'answer_id': 6084, 'author': 'Sid', 'author_id': 10968, 'author_profile': 'https://3dprinting.stackexchange.com/users/10968', 'pm_score': 0, 'selected': False, 'text': '<ol>\n<li>Get a copy of Partition Wizard (Free)</li>\n<li>Take your 16G or 32G or ...? SD card and delete the existing partition.</li>\n<li>Create a 2G partition and format it as FAT.</li>\n</ol>\n\n<p>Yes, you are wasting a lot of the SD card space but given the price of these things these days, who cares. And it will work.</p>\n'}]
['https://3dprinting.stackexchange.com/questions/5247', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/9512/']