The Ellipal Cold Wallet comes with a 16 GB SDHC card. However, the update to the new firmware 3.3.0 via the card did not work even after reformatting with FAT32. Various "tricks" like restarting the wallet in the charging tray did not work either. The wallet always unpacked the ZIP file stored on the SD card, but aborted the upgrade before it started. After some trial and error, the solution was to use a different SDHC card. I had success with a random Sandisk Ultra 64GB, which I packed into the charger with the update file set to FAT32 formatting.
Some links in this post are suggestions / shopping sources and so called affiliate links. If you buy something through this link, we get a small commission. The price for you remains the same. In case of Ellipal Wallet you get a bonus of 5$ with the code ELLPAL, please go to the store page via this link. The coupon is not accepted? Please turn off the tracking blocker. Thank you for your support.