@Arie @Mikecomputing I think also there must be something wrong in PR 1.3, because when I got the device last December the first I did was to import the 12 GB of music in mass storage and incl. the tracking it needs (only) about 45 minutes if I'm not wrong. Compared with the among of data this was acceptable, but I decided that I will divide the data in smaller lots in case of future transfers of large files.