Hello, recently I bought an external Western digital 256Gb SSD, intending to make space available on my 64Gb 8 gen iPad on connection the iPad wasn’t recognising the drive at all then a friend yesterday said that the reason it wasn’t being detected was because my SSD drive was unpowered and only the top end iPads like the iPad Pro were capable of allowing unpowered drives to draw energy from them. This sounds reasonable does anyone know if this is correct & if not what could cause the iPad to ignore my drive? Thanks. S L.