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I try to transfer electrum .exe file from my on line laptop to USB flash memory to set it up on an offline laptop and this message appear , any body have any idea what does it mean
http://[img]https://www.talkimg.com/images/2023/07/09/ZmOY8.jpeg [/img]

It's a Windows-specific issue, not totally related to the Electrum installer file.

It usually appears if the USB Flash Drive's file system isn't the standard FAT/FAT32.
But try to click "Yes" and it should be copied without issues.

If you want to check the file's integrity after copying it, verify its signature by following this guide: https://bitcoinelectrum.com/how-to-verify-your-electrum-download/ (https://bitcoinelectrum.com/how-to-verify-your-electrum-download/)

It's because of the difference between the format used for each drive (your system's storage and the USB disk). Your HDD/SSD which is the source is usually using the newer and more reliable NTFS format while your USB disk which is the destination is using the older and less reliable FAT/FAT32 format hence the warning.

To solve it you should format your USB disk (create a backup of any files you have on there) using the newer and more reliable NTFS format if you can.

Yes that's right ,my HDD is nfts and flash is fat32, I just formt the flash and changing the format from fat32 to nft and it is working and transfer file without any message ,thx