I have a Galaxy S5 with Android 5 and got a new 64 GB SD card. What is the best file system for the SD card? FAT32 is not an option because I want files >4GB. Which file system offers the best performance ? Thank you for your help.
The answer to your question is built into your phone's OS.
1. Put the SD card in your phone
2. Reformat the SD card with your phone(Settings --> Storage/Storage & USB)
3. The file system on the freshly formatted SD card is the type that will give you the best performance with your phone.
4. Outside the context of your phone the optimum file system is another story.
Ext4 should be supported because Android always supports that internally but unfortunately, the SD card is treated differently and even Android One phones do not support Ext4 for the SD card. The Nokia 7.2 Android One phone will not support Ext4 or exFAT or F2FS for the SD card filing system. FAT is the only option in 2019 !