Welcome to the Community,
what's the capacity of the SD card?
Has the SD card been in use for something else before?
Did you try to delete the partition table on the SD card, and run the installation again?
thank you for your answer Andre.
The SD card has esxi 5.1 and I want to delete it and install esxi 6.5
I didn't try to delete the partition table cause I don't know the way to do it.
You can delete the SD card by either booting the host using a Linux Live CD (e.g. gParted), or by connecting it to a PC (assuming that you have a card reader), and deleting the partition table from there (e.g. using parted for Linux, or using the Disk Manager, or the diskpart command line utility in Windows).