Welcome Jurodj, thank you for the question. I understand you are interested in putting backup files or other files onto a USB utility. I have created many Aomei USB utilities, and then put backup files, or small other files onto a separate folder onto the USB drive, and it has always worked.
Before trying this, of course always backup your essential files onto a 3rd drive to be kept separately for safety.
If you are new to using Aomei USB utilities, you should use the standard USB creator. If you are experienced, you could use Ventoy to create an Aomei USB.
Aomei (Win)PE Builder USB: https://www.ubackup.com/pe-builder.html Best for PCs before 2020, includes Partition Assistant, Backupper, Recuva, 7zip, OSF Mount, CPU-Z, Bootice, DiskMgmt.msc. Supports x64 portable apps. Does not support any additional drivers, such as some internal M.2 NVMe disks.
Comments
https://www.ubackup.com/help/create-bootable-disk.html
Add custom drivers, such as NVMe, if necessary. Does not work on some Monitors.
Partition Assistant WinPE USB:
https://www.diskpart.com/help/make-bootable-cd-wizard.html
Add custom drivers, such as NVMe, if necessary.
Aomei (Win)PE Builder USB:
https://www.ubackup.com/pe-builder.html
Best for PCs before 2020, includes Partition Assistant, Backupper, Recuva, 7zip, OSF Mount, CPU-Z, Bootice, DiskMgmt.msc. Supports x64 portable apps. Does not support any additional drivers, such as some internal M.2 NVMe disks.
https://www.ubackup.com/articles/all-in-one-os-bootable-usb-7983-rc.html
Put all bootable ISOs on 1 USB Stick, open source