You’re very welcome.
Some additional information that may be useful in avoiding difficulties...
HDDs tend to more problematic than flash-based storage media - such as USB thumb-drives. For iPadOS to access external media, it must be formatted as FAT, FAT32 or exFAT (FAT64) for universal readability across Apple, Microsoft or Linux systems - or additionally APFS if only used with Apple systems. NTFS and other Microsoft proprietary formats are not supported. Drive formatting must be performed on other computing devices; drive formatting actions are not supported by iPadOS.
Additionally, for compatibility with iPadOS, the drive must only have only single partition.
I hope you find this additional information helpful.