[GraemeJ]

Error report: I was not able to export the library to the SD Card from MS (green). It gives error. I had to export on the internal memory.

Yes - we are aware of this. It's not an MS problem, it's related to the way later Android versions handle the writing of files to an external card (supposedly as a security measure, but it has caused all sorts of problems with older apps and I hope it's a limitation that will not be implemented on later versions).

In cases like yours, it's probably easiest to do the backup to the internal memory first.

Then, when importing into MSP, you can select the external card directory to which to write all your files. Note, however, that you must use the default directory as specified in Settings | Storage | Set the Mobile Sheets Storage Location | SD - you can't make one of your own choosing, it won't work.