I bought a 128GB stick to back up my MacBook Air (Time Machine). This way I don't need to re-format my external HDD I use for backing up files from my Windows machine. Since I won't be using the stick with my Windows machine I thought I might format it with a "better" file system than exFat. Would you recommend formatting it to HFS+?
Best File System for USB Stick Backup – Expert Recommendations
backuphfs+time-machineusb
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Best Answer
From Apple KB : Backup disks you can use with Time Machine
In short, use a Journaled HFS+ partition on a GUID[GPT] formatted disk for best results.