But the parties had not yet come to a definitive agreement, according to a report from The Wall Street Journal.
Toshiba is looking to cover the US$9 billion of losses at its Westinghouse Electric Company which went into bankruptcy in March.
Apple is said to be putting US$3 billion into the deal, which would make it the company's biggest contribution to an acquisition since it bought Beats Electronics in 2014 for US$3 billion.
On 13 September, Toshiba signed a memorandum of understanding with the consortium with the sale price being put at US$18 billion.
Western Digital's response to the MoU was to say that it was surprised the signing had gone ahead, "without SanDisk’s consent, as the language in the relevant joint venture agreements is unambiguous, and multiple courts have ruled in favour of protecting SanDisk’s contractual rights."
To this, Toshiba responded by claiming that Westerbn Digital "persistently overstates its limited consent rights in public statements".