Upload images freezing

Hello –

Over the last 18 months or so I have been gradually putting together a very basic history website using Word Press hosted on 123Reg.

For no obvious reason I have recently been unable to load any more images – it gets to about 40 to at most 63% of the upload and then freezes. I upgraded my hosting package, which has made no difference, and I tried deactivating all the plugins, which also made no difference.

The images are large, but I’m on a professional hosting package, so there ought to be plenty of scope for this, and number of visitors to the site isn’t an issue – it’s really only for family use.

I don’t know what else someone may need to know to be able to advise, but please bear in mind I’m not at all technically minded. I’ve been able to manage all this fine to date without being a techy, but am now stuck. I have looked at lots of the past support responses for this on the forums but can’t see anything that applies, given what I’ve said above. I’m using the Twenty-Fifteen theme.

I have tried 123Reg and followed up the two suggestions they made – that is, deactivate plugins, and that maybe upgrade in case it was a storage issue. Neither has worked.