Why not NTFS? You woould be having issues if you’re working with huge files in the future though if it’s not formatted to NTFS. 
1. NTFS wasn’t designed for USB flash drives.
2. NTFS has journaling which adds overhead to USB flash drive processing.
3. exFAT doesn’t have journaling.
4. exFAT will support large files. It has a file size limit of 16 Exabytes.
