Hi Chris
I deleted all packs and the psr sx600 shows for Voice Wave size : 2/96 Mb
Leftover 94 Mb ..the piano sample size is also 94 Mb
Big chance the piano sample not can be loaded ?
Hi Jan,
you didn't have to
delete the already imported Packs in the YEM right away, you just had to make sure that
no Pack is selected. (If Packs have a
green checkmark, just click on this checkmark so that it turns
gray.)

According to your information ("2 / 96 MB" is shown for the "Voice Wave Size"), obviously a maximum of 94 MB can be used for Packs on the SX600.
I loaded now one steinway voice (sweet) : voice wave size shows : 88/96 Mb
Four colors in the bar ? white is free space? ...
88 here is the space required for the selected content (either entire Packs or parts of them by deactivating unwanted content in the Packs) including the 2 MB which are System reserved.
The BLUE area in the bar is the System reserved storage space (not usable for Packs, but obviously only 2 MB with the SX600). The GREEN area is the space required by the selected
content. The free space is WHITE. If the right part of the bar is RED, the maximum available storage space has been exceeded. (Also visible because the value on the left is higher than the value to the right of the slash.)
As Francesco said: All "Steinberg" Voices in this Pack use the same Samples. I recommend you to select
all (10) Steinberg Piano Voices. This shouldn't take up more storage space than if you selected just one such Voice. Then try to save your Pack Install file (.ppi) and install it on the SX600.
If there is still space free in addition to that Piano Voices (as long as the left value is smaller than the right), you could of course install any additional Voices (either from Francesco's Pack or from any other Pack.

Best regards,
Chris