Ok I have sorted it. This is what turned out to be my issue.
I had previously entered my own password lock, and initially thought that was the password - then after your advice I used the seed - this also resulted in a password error.
So around I went, keep deleting the sia files, entering the seed waiting for the chain to sync - pasting the seed in the password box - getting a password error etc.
Turns out that once I had pasted the seed in to recover, the password box would reject the password if I simply pressed Ctrl+V using the seed already in the clipboard from when I first copied it.
Turns out I had to re-copy the seed, back in to the clipboard and then paste in to the password box. Then and only then would it scan the block chain for my measly SiaCoin.
And I had to that twice, rejecting it the first time - so it takes two attempts before it accepts it.
@PWNICORN I changed the datadir path in config.json to the external storage path, but after running the sia wallet, config.json will overwrite the original datadir path in user / roaming ... I did everything possible as a restart, deleting the original wallet, and still the same. Settings must still be somewhere else in the wallet's basic settings, but I have not found anything like that. Thank you for the advice.
Mobile application development is considered to be the most competitive market and it is a challenging task for developers to complete the client's requirements. When it comes to meeting the client's time limit, buying an application source code from Marketplace can help you by offering ready-made modules for your iPhone or Android application timely.