Most Android based devices such as CCTV, dashcam, etc. indicate that they only support SD card up to 32GB only.
This is simply because SD card of 32GB and below is pre-formatted with FAT32 partition which is accessible by the Android system. Microsoft Windows has put itself a limitation to be able to format a storage device into FAT32 partition for up to 32GB only. It will force you to format storage device above 32GB (eg. 64GB, 128GB, ...) with either exFAT or NTFS.
However, most Android based devices don't support exFAT and NTFS, therefore unable to access your storage device with such partition format.
This does not mean that you cannot use storage device of 64GB and above in those Android based devices, because you can still format them into FAT32 by using 3rd party tool such as the free AOMEI Partition Assistant Standard Edition.
The process to convert exFAT partition into FAT32 with AOMEI Partition Assistant Standard Edition is pretty simple.
You just need to right click on the existing partition, select Format Partition from the menu, set the File System as FAT32, click OK, then click Apply which is the first menu bar option on top.
With this, your 64GB or 128GB SD card is very likely to be able to work without problem in those Android based devices.
Click here to download the AOMEI Partition Assistant Standard Edition software for free. It is free for both personal and commercial use.