https://devzone.nordicsemi.com/f/nordic-q-a/95633/mcuboot-swap-using-move-how-to-calculate-sizeWe are using MCUBoot with MCUBOOT_SWAP_USING_MOVE enabled. We ran into the issue, that we could not run the mcuboot upgrade, when the binary is too big (see also ). The commenter suggest to reserve a partition of flash-sector size at the end of theen-USTelligent Community 13Thu, 12 Jan 2023 15:22:57 GMThttps://devzone.nordicsemi.com/thread/404617?ContentTypeID=1Thu, 12 Jan 2023 15:22:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:16e2b7c6-5de9-4482-9249-66bffa91e62fCla<p>Thanks, yes.<br /><br />TLDR: The relevant size is the flash block size: 4KiB by default</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/404602?ContentTypeID=1Thu, 12 Jan 2023 14:57:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8c622c78-7780-4928-8941-3e0813ba51ccSigurd<p>Hi,</p> <p>This was answered in&nbsp;&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/95599/partition-manager-not-using-flash-efficiently">Partition Manager not using flash efficiently</a>&nbsp;</p> <p>I will close this case here.</p><div style="clear:both;"></div>