Publisher Crashes making a book

[MikeBWD]

Hi All

I am working on a book and Publisher keeps crashing, 8 plus times a day and is getting worse.
File size is 205MB 
Is this the product or computer that is not up to it ?
Has Publisher been used to make books 300page with images (linked)?

Thanks Mike 

I am running it on:
iMac macOS Catalina Version 10.15.6
iMac (Retina 5K, 27-inch, Late 2014)
Processor 4 GHz Quad-Core Intel Core 17
Memory 16 GB 1600 MHz DDR3
Startup Disk SSD
Graphics AMD Radeon R9 M295X 4 GB

Crash reports are sent to apple not sure if you get any of the info. Just got this screen grab (just word and a browser open)

[Callum]

Hi Mike,

Please could you go into the apps preferences and send me a screenshot of the entire performance tab?

Thanks

Callum

[MikeBWD]

Hi Callum

enc screen grab 

Thanks 

[MikeBWD]

@Callum Hi Just trying to get Publisher working existing files crash or show corrupt tile, Disk Usage Warning. can't work with it at all, any ideas.

Started to create anew document from an archived version but still get crashing.

Checked version: Affinity Publisher 1.8.4 is currently the newest version available.