So my ipad2 is struggling with photo posts like this one. I think it may soon become just a reading tablet. I have been thinking of upgrading my desktop but think that perhaps I should upgrade to a new large iPad Pro first since I would enjoy editing with a pen on a tablet. It seems that iOS 11 will allow RAW import so I would shoot, import from SD card to Lightroom on my laptop and the export culled collection back to SD card for import into Lightroom mobile then Affinity on the iPad Pro for edits. A file manager app can take care of the transfer but perhaps a wifi transfer back in to collection for storage and backup. I am continuing to explore this option so more later!