How can I connect ssd drive to my 2017 iPad Pro ?

Hello,

You will need Apple's Lightning to USB 3 Adapter. This adapter will allow you to connect USB-A devices to your iPad Pro. The 2017 iPad Pro is incompatible with USB-C devices.

Hello,

A USB-A hard disk can work in Files assuming it is in the correct format.

iPadOS 13 supports the following disk formats:

• macOS Extended journaled — YES read and write
• FAT32 — YES read and write
• XFAT — YES read and write
• NTFS — NO
• APFS — YES