What format do I format a pen drive in for use on Mac

Hi
My USB pen drive has somehow got corrupted from using it in both windows and MAC - I want to erase and re-format it disc utility but I dont know which format option to choose.
I would lke to be able to use it in both windows and Mac machines.
Thanks

Hello again
Thank you for that suggestion - I have tried it but still ge the message:
"Unable to write to the last block of the device"
Any other suggestion greatfully received!

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I have noticed that my pen drives/memory cards & hard drives are filling up even when
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Think this is the right forum...
I want to instal a program onto an external hard drive for use on both mac and windows. The program supports both mac and windows.
My plan is to get an external hd and partition it in half. One half i will format mac os extended and the other i will format ntfs. I'll instal the mac version on the mac partition and the windows version on the ntfs partition.
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An easier solution might be to just connect the drive to a Windows PC and format it as FAT32. Both Windows (98 and higher) as well as Mac allow full read/write access to FAT32 formatted drives. No need to download any drivers, etc. It just works.
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What format do I format a pen drive in for use on Mac

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