QDir::mkpath() and mkdir() keep failing to create folder

WhatIf

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koahnig

Probably you need check out what and where you trying to create the new folder. E.g. with:

qDebug() << "homeLocation            " << homeLocation;
qDebug() << "location                       " << location;
qDebug() << "pathToPhotosFolder " << pathToPhotosFolder;

Are you on windows?
You are using a backslash which is typically used for windows. In general on any operation you may use with Qt a single forward slash as separator.

My guess your problem is solved with:

 QString pathToPhotosFolder = homeLocation+"/photos"

Otherwise you are simply extending the homeLocation's name whatever it is.