Just make sure to select a good reliable brand since the quality of many USB sticks is extremely poor, both in performance & reliability...I have found many which will corrupt data intermittently (discovered by actually testing some USB sticks looking for these errors).
Many USB sticks out there are extremely slow so make sure to check their actual transfer rates. The majority will be only about 20MB/s to 40MB/s, but there are some which may write at 150MB/s which is much better, and just a few which can actually write at about a max of 380MB/s.
Don't assume just because a USB stick is advertised as USB3.2 that it will be fast. That "USB3.2" designation is just the protocol the device supports and has no bearing on how fast the device will transfer. Many manufacturers and vendors (aka sellers) will hype the USB3 speed designation to distract you from how slow the device really is. If the manufacturer does not clearly list actual read & write speeds, then assume the drive will be extremely slow.
SanDisk is usually fairly good. They have slow, medium, and fast versions so look carefully at the read & write speeds for each model. Even many familiar & popular brands have some issues, plus the products keep changing so it is hard to recommend a specific model.
Usually a USB stick comes formatted from the factory with an MBR legacy partition and FAT32 file system....some may use the exFAT file system instead. If it does come pre-formatted with the exFAT file system, then then macOS may or may not be able to mount it...it all depends on the specific characteristics the factory used with exFAT since macOS cannot read some variations of exFAT. However, if this is the case, then you just need to use Disk Utility on macOS to erase the USB stick as exFAT so it has a version which macOS recognizes (Windows will also recognize it this way too).
You can use any file system you want on a USB stick. It all depends on how you plan to utilize the drive. The same goes for the partition type which can be either MBR (usual default of USB sticks) or GUID (aka GPT).
You can use Disk Utility on macOS to erase the drive using any of the following file systems:
- MacOS Extended (Journaled) -- a macOS specific file system recognized by current & older Macs
- APFS -- a new Apple file system only recognizable by macOS 10.13+
- FAT32 (aka msdos) -- Has been the default file system on USB sticks for many years as every OS can utilize it, but it has some limitations such as not being able to handle files 4GB or larger
- exFAT --- a later extended & updated version of FAT32 which can support 4GB and larger files and is becoming more popular when needing to share files with Windows. This file system is also compatible with every OS
Here is an article with more details including pictures of the process to erase an external drive:
https://www.hellotech.com/guide/for/how-to-format-a-hard-drive-for-mac